Which of the following rows identifies the site of fertilization and the area in which a fertilized egg implants, respectively?

a. Site of fertilization: uterus Site of Implantation: Endometrium. B.Site of fertilization:uterus Site of Implantation Placenta. C. Site of fertilization:fallopian tube Site of Implanttion Endometrium. D.Site of fertilization:Fallopian tube Site of Implantation:Placenta. I have my answer as D but i'm not sure if its right or not. I have a few more questions. I thought it is more easier to give them at the same time rather than posting them 1 by 1. :) 

Which of the following statements does NOT correctly describe the events following fertilization?

Select one:

a. Only the inner cell mass cells in a blastocyst are pluripotent.

b. The trophoblast has an important role in maintaining the pregnancy, as it prevents the endometrium from shedding.

c. As hCG takes over maintaining the endometrium immediately after implantation, the corpus luteum degenerates into the corpus albican.

d. All 16 cells in a morula are truly totipotent, meaning that they can become any cells in the human body. 

The chance of successful fertilization is approximately 18% in every cycle. Why does this statistic seem so low? All of the following statements provide a reason as to why the chance of fertilization is only 18% for every ovarian cycle EXCEPTSelect one:

a. If more than one sperm fertilize an egg, multiple embryos can result. 

b. The vagina is very acidic, killing many sperm cells.

c. Some sperm cells are not very motile, while others are formed without a tail.

d. There are two Fallopian tubes and two ovaries, but only one of them releases an ovum every cycle.

 

 

Human chorionic gonadotropin (hCG) hormone is produced by a fertilized egg in order to maintain elevated levels of estrogen and progesterone. hCG is also used to induce ovulation during IVF procedures and is known to stimulate the production of testosterone in the testes. 

Which of the following hormones has similar functions as hCG?

Select one:

a. Estrogen

b. LH

c. Inhibin

d. FSH

Thank you so much for your help last time. :)