NEET PG DENTAL EXAM

Detailed explanation-1: -About 6 days after fertilization, the blastocyst attaches to the lining of the uterus, usually near the top. This process, called implantation, is completed by day 9 or 10.

Detailed explanation-2: -Implantation begins with apposition of the blastocyst at the uterine epithelium, generally about 2-4 days after the morula enters the uterine cavity. The implantation site in the human uterus is usually in the upper and posterior wall in the midsagittal plane.

Detailed explanation-3: -Day 7 blastocyst shows significantly lower clinical pregnancy and live birth rate than day 3, day 5, and day 6 embryos. A significantly higher risk of miscarriage rate in the first trimester yet significantly lower ectopic rate was found in day 7 blastocysts compared with day 3 embryos.