<prompt> Which is false regarding HCG?It is a glycopeptideSynthesized by cytotrophoblastDoubling time is 2 daysHigh levels are seen in multiple pregnancies  <response>: Ref: Text book of Obstetrics by D. C.Dutta. 7th, ed. Pg. 58Explanation:Human chorionic Gonadotrophin HCGHCG is a glycoprotein, it consists of a and b subunits, a subunit of HCG is biochemically similar to LH.FSH and TSH.HCG is synthesized by syncitiotrophoblast.Half life of HCG is 24 hrs and Doubling time is 1.4 to 2 daysHCG is responsible for rescue and maintenance of corpus luteum till 6 wk of pregnancy.Maximum level is reached between 60 to 70 days of pregnancy.High levels of HCG are seen inMultiple pregnancyHydatidifom moleChoriocarcinomaDowns syndrome fetusREMEMBER:Protein hormones produced by placenta are:HCGHuman placental lactogenPAPP-A pregnancy associated placental protein ASteroid hormones produced by placenta areEstrogenProgesterone 