<prompt> True about HCG: September 2012Produced by cytotrophoblastPrevent involution of corpus luteumValue reaches maximum level at 20 week of pregnancyIts secretion stas after 2 day of ovulation  <response>: Ans. B i.e. Prevent involution of corpus luteum Beta-HCG HCG is secreted by: Synctiotrophoblasts Structurally HCG has: 2 subunits, It is a glycoprotein 