As pregnancy progresses the doubling time increases. By 6 to 7 weeks gestation beta hCG levels ...
Table2shows serum hCG concentration during pregnancy as measured by the Siemens Immulite 1000 assay. Total hCG concentration rises from pregnancy implantation (3rdweek of gestation) to a peak at 10 weeks of gestation. hCG levels rise exponentially during the first 7 weeks of pregnancy, increasing a...
( 1997 ). Urinary beta core hCG: screening for aneuploidies in early pregnancy (11–14 weeks' gestation) , Prenat. Diagn. , 17 , 401 – 405 . TODO: clickthrough URL MedlineMacintosh MCM, Nicolaides KH, Noble P, Chard T, Gunn L, Iles R. 1997. Urinary b-core hCG: screening for...
Maternal serum free β-hCG was measured at 10 to 14 weeks of gestation in 136 normal twin pregnancies and in 12 twin pregnancies where one or both fetuses had trisomy 21. The values were compared with a normal range from 4181 singleton pregnancies. In the normal twins the median free β-...
Initial studies at 17–22 weeks' gestation evaluating urinary β-core human chorionic gonadotrophin (hCG) as a marker for Down's syndrome had suggested that it may have more potential than its serum counterpart. This study measured maternal urinary β-core-hCG and creatinine at 11–14 weeks' ...
The role of hCG in the regulation of testicular steroid production in human fetuses from 14 to 20 weeks gestational age was studied. Saturable binding of 125I-hCG to testicular homogenates was demonstrated, and physiologic concentrations of hCG were able to stimulate testosterone formation in testicul...
Maternal serum HCG (MSHCG) is higher when the fetus is a female than when it is male. This has been demonstrated in the second and third trimesters of pregnancy, and recently at 10-14 weeks gestation. In this study we assessed whether this gender-related difference can be detected as ear...
In particular, very early PTD (birth before 32 weeks of gestation), is associated with increased risks of both short and long term complications, such as organ dysfunction or declined motor and cognitive development. Human chorionic gonadotropin (hCG) is a glycoprotein hormone often used to ...
Generally, hCG values double every 48-72 hours during the first 12 weeks of gestation. From this point on, hCG levels will gradually decrease. For this reason, normal hCG values vary according to the gestational period in which the woman is. ...
Very early HCG dynamics predict pregnancy loss at up to 10 weeks gestationacrosome reactionhuman spermatozoaICSIscanning electron microscopya prospective case-control study of 127 normozoospermic and 435 non-normozoospermic Caucasian men, the genotype frequencies of a polymorphism of the interleukin-...