Gestational sac meaning in malayalam

sac മലയാള വ്യാഖ്യാനം, അര്‍ഥം. Malayalam meaning and translation of the word sac An irregular gestational sac is the sac of fluid in which an embryo develops in very early pregnancy that has irregular or ill-defined borders in comparison to a normal gestational sac. Gestational sacs can vary in shape to a certain degree, but an irregular gestational sac is usually a cause for concern as they are predictors of poor pregnancy. The gestational sac (GS) is the first sign of early pregnancy on ultrasound and can be seen with endovaginal ultrasound at approximately 3-5 weeks gestation when the mean sac diameter (MSD) would approximately measure 2-3 mm in diameter.. A true gestational sac can be distinguished from a pseudogestational sac by noting:. its normal eccentric location: it is embedded in endometrium, rather. The gestational sac is the structure surrounding the fetus early in pregnancy and its shape early in pregnancy (usually before 8-10 weeks) is important. Ideally, the gestational sac should be round. But other shapes can also be normal, and there is no sure way of predicting what it means. When it's found to be abnormally shaped, the sac should. Nicole Madison The gestational sac encloses the embryo and amniotic fluid. The gestational sac is a structure that surrounds an embryo, which is a baby in the very early stages of development.It encloses not only the embryo, but also the amniotic fluid, which helps to nourish and protect the developing baby.The gestational sac is the structure ultrasound technicians look for when they need to.

Gestational sac measurement Mean of 3 orthogonal planes Growth in early pregnancy 1mm/day Knez et al Best practice Reseach Clin O & G 2014;28:621-36 54w mean ø3.9mm 64w mean ø18.8mm Gestational sac diameter week Discovery of a gestational sac during an ultrasound is surely a positive pregnancy sign. However, the presence of a gestational sac alone may not guarantee a normal pregnancy. Apart from the gestational sac, it is important that a yolk sac, which forms within it, also gets developed If a gestational sac is not seen on an early pregnancy transvaginal ultrasound by around 5 weeks gestational age, there are several things that could be occurring. If a gestational sac is not visible, it could mean that: It is too early in the pregnancy. The pregnancy is ectopic. The pregnancy is a miscarriage

GSD - Gestational sac diameter. Categories Calculators Tags eng, fetal ultrasound gsd, tag pregnancy, tag ultrasound, tool fetal ultrasound, tools. Calculator. Gestational age (GA) GSD Gestational sac, mm * * Mean diameter = ( length + height + width ) / 3. GSD. Gestational sac. Calculate. Small gestational sac, along with some other early ultrasound findings (such as enlarged yolk sac, or small gestational sac in relation to the size of embryo measured by crown-rump length), may not be enough to definitively diagnose a miscarriage or other pregnancy loss (such as a blighted ovum) Peter Twining, in Textbook of Fetal Abnormalities (Second Edition), 2007. Gestational sac, yolk sac and fetal pole. The gestational sac may be recognized as early as 4 weeks and 1 day from the last menstrual period and should always be seen after 4 weeks and 4 days. Its diameter is about 2 mm and increases in size to measure 5-6 mm at 5 weeks. 44 The mean gestational sac diameter then. An empty gestational sac is a cavity within a uterus that forms to house a pregnancy but the embryo has stopped growing. This means that a fertilized egg was capable of implanting within the uterine wall to signal a pregnancy, but the embryo does not continue to develop and the pregnancy fails to progress. It is an early form of miscarriage

sac മലയാള വ്യാഖ്യാനം, അര്‍ഥം

What is an Irregular Gestational Sac? - Definition from

The gestational sac and yolk sac should be located in the uterus. Determine the number of fetuses. This can be done by counting the number of fetal poles, or fetal heart bears after around 6 weeks. Estimate gestational age. This is most accurately done by measuring the greatest length of a fetal pole, called crown-to-rump length Dr. Andrew Silverman answered. 49 years experience Fertility Medicine. Blighted ovum: A gestational sac without a fetal with a gestational age of almost 7 weeks is most likely a blighted ovum (non development of the fetus) Mean sac diameter (MSD) is an ultrasound measurement of the structure that houses a developing embryo in very early pregnancy called the gestational sac. It is usually first seen with transvaginal ultrasound at around 5 weeks gestation Empty Sac Pregnancy . When the gestational sac is empty (meaning there's no yolk sac or embryo by the time that there should be), this is known as an empty sac pregnancy. Other terms for an empty sac pregnancy are an anembryonic pregnancy or a blighted ovum (a term that's now considered to be outdated)

Gestational sac Radiology Reference Article

The gestational sac is a large cavity of an amniotic fluid surrounding embryo in the upper part of the uterus. Thus, it is one of the earliest signs for detecting the pregnancy. The gestational sac is like a cover for the embryo. It is formed about five to seven weeks after the natural menstruation cycle. It appears like a white-coloured rim. What does gestational-sac mean? (medicine) The intrauterine structure around an embryo in the very early stage of a fetus that can be used to determine.

The Gestational Sac In Pregnancy babyMed

  1. Gestational trophoblastic disease (GTD) is a term used for a group of pregnancy-related tumours.These tumours are rare, and they appear when cells in the womb start to proliferate uncontrollably. The cells that form gestational trophoblastic tumours are called trophoblasts and come from tissue that grows to form the placenta during pregnancy.. There are several different types of GTD
  2. Sac Meaning in Malayalam : Find the definition of Sac in Malayalam, OneIndia Malayalam Dictionary offers the meaning of Sac in Malayalam with synonyms, antonyms, adjective and more related words in Malayalam
  3. 1-2mm (4 weeks 2 days gestational age), and grows to 2-4mm at 32-35 days and is 5mm at 36-37 days (menstrual age). Ring of decidualized endometrium. Small gestational sac prior to visualization of the yolk sac or embryo. Note the marked vascularity on power Doppler at the site of implantation. Full bladder
  4. A total of 22 929 women had intrauterine pregnancies with a visible gestational sac using ultrasound. Of women with a visible gestational sac, the presence of a chorionic bump was associated with higher maternal age and vaginal bleeding (33 vs 30 years (P = 0.001) and 50.8% vs 30.3% (P = 0.0008, ch

The mean gestational sac diameter is measured inside its hyperechoic rim. If the sac is round, only one measurement is needed. More commonly, when it is oval, three orthogonal (perpendicular) measurements of the sac are taken and averaged. Gestational age is estimated based on the mean sac diameter (Table 12-1) See answer : An empty amniotic sac usually indicative of a non-viable pregnancy or what is known as a blighted ovum which occurs when a fertilized egg implants Read More. 90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now Hey y'all! I had my first ultrasound yesterday. According to my app and last period I was 6w3d. My ultrasound showed an empty sac. Fertility doctor said I could be way earlier and that's why nothing but gestational sac is showing up on ultrasound. I go back in a week to recheck. He did my date according..

What is the Gestational Sac? (with pictures

• The gestational sac is an echo-free space containing the fluid, embryo, and extraembryonic structures. • The sac is measured inside the hyperechoic rim, including only the echo-free space. • The gestational sac is imaged first in the longitudinal plane, obtaining long axis and anteroposterior measurements perpendicular to each other. 67 Results for gestational sac translation from English to Tagalog. API call; Human contributions. From professional translators, enterprises, web pages and freely available translation repositories. Add a translation. English. posterior cul de sac meaning in medical term. Tagalog ive just had an early scan 6w & have one gestational sac, three yolks and one heart beat. does this mean that one embryo split into three and these are identical triplets? and can the two yolks catch up still? next scan seems too far away Answered by Dr. Ralph Boling: Possibly: split into three, but from what you describe, only one heart.. In equivocal cases, MRI can be used to differentiate these two conditions and to help define the location of the gestational sac in the uterine horn (Fig. 17). In cornual pregnancy, the gestational sac is eccentrically located, is surrounded by a rim of myometrium, and is located more than 1 cm from the lateral wall of the endometrial cavity [22] Small gestational sac in relation to the size of the embryo (<5 mm difference between mean sac diameter and crown-rump length) *Criteria are from the Society of Radiologists in Ultrasound Multispecialty Consensus Conference on Early First Trimester Diagnosis of Miscarriage and Exclusion of a Viable Intrauterine Pregnancy

The yolk sac is situated on the front part of the embryo. Another factor involved in the importance of what is yolk sac in pregnancy is when the gestational sac is empty meaning there is no yolk sac or embryo by the time should be it is known as an empty sac pregnancy. An empty sac pregnancy is also known as an embryonic pregnancy or blighted ovum Your doctor calculates your stage of pregnancy or your gestational age using your last menstrual period (LMP). She will ask you when the first day of your last period was and from there, count how many weeks pregnant you are. This is also how your doctor will estimate your due date by counting 40 weeks from the first day of your last period. However, be aware your due date is just an estimate 2. Abnormal yolk sac. The yolk sac is the earliest fetal structure that forms in the gestational sac within the uterus during pregnancy. Having a yolk sac that is too large or too small has been associated with pregnancy loss. However, abnormal sac size occurs in approximately 17% of pregnancies. In many cases, women go on to have normal. Gestational sac with possible movement but couldn't tell. 3 mm cyst on my ovary also. Got labs done Monday( 7/6)and doing them again tomorrow Wednesday 7/8 and a another trans v ultrasound Monday 7/13. Just super nervous. And emotional the last two days Next Question. You are reading content posted in the Women's Health: Postpartum Community. Gestational age is a key piece of data used by healthcare providers to determine the timing of various screening tests and assessments of the fetus and mother throughout pregnancy. Gestational age may be assessed at any time during pregnancy, and several modes of assessment exist, each requiring different equipment or skills and with varying degrees of accuracy

Gestational Sac during Pregnancy - FirstCr

What No Gestational Sac on the Ultrasound Mean

Gestational age (GA) 10w 11w 12w 13w 14w 15w 16w 17w 18w 19w 20w 21w 22w 23w 24w 25w 26w 27w 28w 29w 30w 31w 32w 33w 34w 35w 36w 37w 38w 39w 40w 41w 42w 1d 2d 3d 4d 5d 6d CHL Crown-heel length , m The size of the hematoma estimated as a fraction of gestational sac size significantly correlated with first trimester pregnancy loss (P <0.001) 6-11 weeks (all GAs): AUC 0.660. ≤8 weeks: AUC 0.613. Risk of fetal demise based on hematoma size as fraction of gestational sac size (diagnosed 6-11 wks) SCH <10% of GS size: 5.8% The gestational age should ,therefore, be at least 10 to 12 weeks if fetal heart tone are heard. Human Chorionic Gonadotropin Pregnancy Test Human chorionic gonadotropin first becomes detectable in the mother's blood and urine between 6 and 14 days after fertilization (3 to 4 weeks gestational age) [11-13] Exam: First Trimester (Transvaginal Ultrasound) Gestational Sac (5 weeks gestation, bHCG 1800) Round echolucent (black) sac with echogenic ring located in fundus. Age on mean diameter: (length + width + height)/3. Yolk Sac (6 weeks gestation) Small echogenic walled round sac within Gestational Sac. May appear more as '=' sign rather than circle

Gestational sac (GS) char

Gestational Age Vs. Fetal Age: As explained above, fetal age is normally two weeks less than the gestational age. After the birth of the baby, assessment of weight, length, head circumference, skin and hair condition of the newborn baby helps decide the gestational age; which in turn helps determine whether the newborn baby needs any special care A blighted ovum is the cause of about 50% of first trimester miscarriages and is usually the result of chromosomal problems. A woman's body recognizes abnormal chromosomes in a fetus and naturally does not try to continue the pregnancy because the fetus will not develop into a healthy baby. This can be caused by abnormal cell division, or. gestation definition: 1. (the period of) the development of a child or young animal while it is still inside its mother's. Learn more An irregular gestational sac (lack of a smooth contour and/or presence of a distorted sac shape) is highly suggestive of an abnormal IUP. In one series, this finding had a 100% specificity and a 100% positive predictive value for an abnormal IUP, but it had a low sensitivity of 10% . The presence of. Gross description. Spontaneous abortion: Soft hemorrhagic mass of spongy tissue (villi) and soft tissue (decidua) that may be attached to membranes as an intact or ruptured gestational sac. Report should indicate presence of sac, state of rupture and presence of umbilical cord. Fetal parts should be documented and closely examined for anomalies

sac [sak] a baglike organ or structure; see also bag, pocket, and pouch. air s's (alveolar s's) the spaces into which the alveolar ducts open distally, and with which the alveoli communicate; see also lung. amniotic sac the sac formed by the amnion, enclosing the fetus suspended in amniotic fluid; popularly known as the bag of waters. conjunctival sac. The ultrasound typically shows a gestational sac and within it we can see a 3-5 mm bubble-like structure, which is the yolk sac. Stage Four: Approximately six weeks after a pregnant woman's last period, we can see a small fetal pole, one of the first stages of growth for an embryo, which develops alongside the yolk sac

May 4, 2020 at 6:08 AM. I'm in the same situation. I went in for my first ultrasound 8week1day. They said gestational sac and yolk sac but no fetal pole. My hcg has been increasing and I've been feeling sicker and sicker but my gestational sac was only measuring about 6wk. I'm going back for my second ultrasound GS - Gestational sac; one of the first measurements that can be taken with an ultrasound, the sac and fluid that surrounds the fetus HC - Head circumference; measurement around the baby's head in millimeters, a basic measurement used with BPD, FL and A

Examples of how to use yolk sac in a sentence from the Cambridge Dictionary Lab The use of ultrasound in early pregnancy has led to the earlier diagnosis of molar pregnancy. Soto-Wright et al. 8 demonstrated a reduction in the mean gestation at presentation, from 16 weeks of gestation between 1965 and 1975 to 12 weeks of gestation between 1988 and 1993. There has been a further reduction in gestational age at diagnosis to 9 weeks of gestation between 1994 and 2013. 9 The. Intrauterine sacs embryonic structures. Warren and associates described the orderly appearance of gestational sac, yolk sac, and embryo with heartbeat at a given number of days from the onset of the last menstrual period (Table 1). 1 With a transvaginal probe, a 2- to 3-mm gestational sac can usually be seen by 5 weeks from the last menstrual period (Fig 1A) The yolk sac is the first structure often seen within the gestational sac and it confirms an intrauterine pregnancy. The yolk sac is first seen by transvaginal ultrasound when the mean gestational sac diameter is ≥5 mm, and should always be visualised when the mean gestational sac diameter is >7 mm Low amniotic fluid (oligohydramnios) is a condition in which the amniotic fluid measures lower than expected for a baby's gestational age. No treatment has been proved effective long term. But short-term improvement of amniotic fluid is possible and might be done in certain circumstances. During pregnancy, amniotic fluid provides a cushion that.

What is meaning of gestational sac in upper uterine endometrial cavity? MD within the sac, but a gestational sac with regular margins & adequate surrounding chorio-decidual reaction is seen in the upper uterine endometrial cavity. she is very much worried, please help... 8 weeks pregnancy, USG shows yolk sac without fetal pole. Meaning? The fetal pole is the term used for developing baby when is it first seen in the gestational sac .It is essentially a thick part near the yolk sac before the baby has an identifiable normal shape.The yolk sac is a sac that is attached to the embryo that is responsible for. sac (arrow) is an eccentric round echogenic ring within the gestational sac. The MSD is 12 mm, projecting to a gestational age of 5 weeks 6 days. (b) The yolk sac is seen as two parallel lines—representing the leading edge and posterior wall—within a small gestational sac. The MSD is 4 mm, projecting to a gestational age of 5 weeks 0 days (7) Gestational sac means the structure that comprises the extraembryonic membranes that envelop the fetus and that is typically visible by ultrasound after the fourth week of pregnancy. (8) Intrauterine pregnancy means a pregnancy in which the fetus is attached to the placenta within the uterus of the pregnant woman Small for gestational age fetuses are defined by the finding that the abdominal circumference is bolow the 5 th centile for gestation. About 80% of such fetuses are constitutionally small, with no increased perinatal death or morbidity, 15% are growth restricted due to reduced placental perfusion and utero‑placental insufficiency, and 5% are growth restricted due to low growth potential.

Small Gestational Sac: Sac Size in Early Pregnanc

Estimated date of confinement meaning in malayalam. Confinement Meaning in Malayalam : Find the definition of Confinement in Malayalam, OneIndia Malayalam Dictionary offers the meaning of Confinement in Malayalam with synonyms, antonyms, adjective and more related words in Malayalam The Malayalam for confinement is നിരോധം. Find more Malayalam words at wordhippo.com estimate. Know the meaning of Sac word. On maxgyan you will get Sac malayalam meaning, translation, definition and synonyms of Sac with related words What amniotic sac means in Malayalam, amniotic sac meaning in Malayalam, amniotic sac definition, explanation, pronunciations and examples of amniotic sac in Malayalam. Also see: amniotic sac in Hindi. Our Apps are nice too! Dictionary. Translation. Vocabulary. Games. Quotes. Forums. Lists. And more..

Gestational Sac - an overview ScienceDirect Topic

Malayalam Meaning of Sac. Thanks for using this online dictionary, we have been helping millions of people improve their use of the malayalam language with its free online services. Malayalam meaning of Sac is as below.. Gestational Sac (4-5 weeks) The gestational sac is a collection of fluid surrounding the embryo and yolk sac. It is the first structure to be seen in the development of an IUP. It will have these features: Anechoic (dark), round structure with an echogenic (bright) border GESTATIONAL SAC. The gestational sac(GS) is the earliest sonographic finding in pregnancy. It will be difficult to see if the mother has a retroverted uterus or fibroids. The GS is an echogenic ring surrounding an anechoic centre. An ectopic pregnancy will appear the same but it will not be within the endometrial cavity

First Trimester: Normal Exam - OB Images - OB Images

What is an Empty Gestational Sac? - Definition from

Within this time period, a yolk sac can be seen inside the gestational sac. The yolk sac will be the earliest source of nutrients for the developing fetus. Human chorionic gonadotropin (hCG) levels can have quite a bit of variance at this point. Anything from 18 - 7,340 mIU/ml is considered normal at 5 weeks ABNORMALITIES IN THE SHAPE OF THE GESTATIONAL SAC . Normal Shape. Abnormal Shape. An oblong gestational sac on transabdominal scanning may result from an overfilled bladder. Irregular crenated inner margin. Distorted shape. An oblong gestational sac on transabdominal scanning may result from an overfilled bladder Catholic SAC abbreviation meaning defined here. What does SAC stand for in Catholic? Get the top SAC abbreviation related to Catholic

Gestational age is the common term used during pregnancy to describe how far along the pregnancy is. Gestational age is measured in weeks, from the first day of the woman's last menstrual cycle to the current date. A normal pregnancy can range from 38 to 42 weeks. A pregnancy is now considered full term at 39 weeks If the ultrasound shows a gestational sac in the uterus, the doctor can most likely rule out tubal pregnancy as a cause of slow-rising hCG levels or bleeding and cramping. A transvaginal ultrasound showing no gestational sac with an hCG level above 1,500 is considered fairly certain evidence of an ectopic pregnancy

Sonographically, gestational sac is identified eccentrically in the myometrial portion of fallopian tube and is surrounded by thin layer of myometrium that measures <5 mm. Interstitial line sign has been described as a specific sign of interstitial pregnancy, which is described as an echogenic line extending into the upper portion of the horn. Gestational sac is the first sign of pregnancy seen on ultrasound and it encompasses the embryo (baby) and the amniotic fluid (the fluid that surrounds the baby in the womb). Well, just like the doctor said, it's a bit too early to know for sure if you're pregnant Gestational sac diameter (GS) The gestational sac can be visualized as early as 4.5 weeks. It increases by about 1 mm per day. As the sac is not usually round, an average of the length, width and depth is made. The acccuracy of dating using GS size is low and can be off by a whole week. This is therefore not recommended ges·ta·tion (jĕ-stā′shən) n. 1. The period of development in the uterus from conception until birth; pregnancy. 2. The conception and development of a plan or an idea in the mind. [Late Latin gestātiō, gestātiōn-, from Latin, a carrying, from gestātus, past participle of gestāre, freqentative of gerere, to carry.] ges′ta·to′ry (jĕs. Gestational sac: An artificially colored image of the contents in the cavity of the uterus seen at approximately 5 weeks of gestational age by obstetric ultrasonography. The extra-embryonic coelom (or chorionic cavity) is a portion of the conceptus consisting of a cavity between Heuser's membrane and the trophoblast

Gestational diabetes is a type of diabetes that a woman can develop during pregnancy. It usually develops after week 20 of pregnancy and goes away after delivery. Gestational diabetes happens. Mean sac diameter measurements are not recommended for estimating the due date. Beyond measurements of 84 mm (corresponding to approximately 14 0/7 weeks of gestation), the accuracy of the CRL to estimate gestational age decreases, and in these cases, other second-trimester biometric parameters (discussed in the following section) should be. Five week pregnancy ultrasound with sac and yolk sac. Transvaginal ultrasound, normal pregnancy at 5 weeks 2 days. Gestational sac (black area ) and yolk sac are seen. Sac measures 6.25mm diameter. Yolk sac (small white circle in left side of the sac) Yolk sac is a source of nutrients for the fetus. The fetus is too small to be seen this early. Definition of Gestational Age in the Definitions.net dictionary. Meaning of Gestational Age. What does Gestational Age mean? Information and translations of Gestational Age in the most comprehensive dictionary definitions resource on the web

Diagnosis and treatment of ectopic pregnancy | CMAJ

Blighted Ovum Miscarriage. A blighted ovum is a type of miscarriage that occurs very early in pregnancy in which the fertilized egg is not able to develop into an embryo after it has attached itself to the uterine wall. This type of miscarriage usually occurs within the very early stages of pregnancy (weeks 2-6), often before a woman even knows. Gestational diabetes (also called gestational diabetes mellitus or GDM) is a kind of diabetes that some women get during pregnancy. It's a condition in which your body has too much sugar (called glucose) in the blood. When you eat, your body breaks down sugar and starches from food into glucose to use for energy Blighted ovum: A fertilized ovum (egg) that did not develop or whose development ceased at an early stage, before 6 or 7 weeks of gestation. On the ultrasound examination of a blighted ovum, only the gestational sac that normally surrounds the embryo can be seen. There is usually no embryo inside the gestational sac. A blighted ovum is a form of early spontaneous abortion (miscarriage) Gestational trophoblastic disease is the name for a group of rare tumors that are usually related to pregnancy. Learn about the types of tumors, symptoms they cause, and how they're treated However, if the gestational sac survives, reattachment to the endometrial wall might be enough for further progression of the pregnancy without any other adverse effects. In conclusion, SCH in patients with threatened abortion during the first half of the pregnancy increases the risk of miscarriage

Gestational sac First sign of early pregnancy, usually seen between 3-5 weeks gestation Double decidual sac sign Two concentric rings (uterine lining and gestation lining) around anechoic gestational sac) Highly suggestive of intrauterine pregnancy (before yolk sac or embryo embryo visualize 2. Defining gestational age. The accurate determination of gestational age is critical for pregnancy management as it shows wherever the measurements of the fetus are in line for the estimate gestational age [].In addition, a correct pregnancy dating is necessary not only for the appropriate timing for screening and diagnostic testing but also for optimal scheduling of delivery []

Early Pregnancy Failure and Ectopic Pregnancy | Obgyn Key9 weeks of pregnancy: gestational sac and embryo - 3D scan

This is called persistent gestational trophoblastic neoplasia (GTN). This occurs in about 15% to 20% of complete molar pregnancies, and up to 5% of partial molar pregnancies. One sign of persistent GTN is a high level of human chorionic gonadotropin (HCG) — a pregnancy hormone — after the molar pregnancy has been removed Visualizing an empty gestational sac. An empty gestational sac is the result of 1 of 3 entities: 1) a normal early IUP, 2) an abnormal IUP, or 3) a pseudogestational sac in a patient with an ectopic pregnancy. Using a vaginal approach, the mean diameter of this sac exceeded 20 mm. Neither a yolk sac nor embryo was visible A blighted ovum is an egg that is fertilized but doesn't develop 1). A blighted ovum is a common problem and may cause up to 50% of miscarriages in the first 12 weeks. A blighted ovum, also called an anembryonic pregnancy or anembryonic gestation, occurs when the early embryo stops developing, is resorbed and leaves an empty gestational sac. Difference Between IUGR vs. SGA IUGR is Intrauterine Growth Retardation or restriction in which fetal growth is restricted. SGA is a Small for Gestational Age fetus or infant; smaller than 10% of all individuals at that gestational time period. What is IUGR? Definition: IUGR is intrauterine growth retardation or restriction, and it is the condition in which the growth [ hCG with Gestational Table - hCG may reach detectable limits within 7-10 days of conception. hCG is produced by the placenta and reaches a peak between the 7th and 10th week of gestation. hCG is a glycoprotein hormone produced by the syncytiotrophoblast of the placenta and secreted during normal pregnancy and with pathologic conditions such as hydatidiform mole, choriocarcinoma and testicular.