In cryptorchidism, one or both testes of an infant have not descended into the scrotal sac by the first birthday. In these cases, the testes are surgically descended. Why must the testes be descended if the later fertility of the child is to be maintained?

Name the canal through which the testis descend into scrotum just before the birth.

Describe the effects of steroid hormones on the cervix as they change during the oestrous cycle

A.)  Which cells in the testis produce the male hormone testosterone: B.)  When the ovary is in the follicular phase, the uterine cycle goes through the ______?_________ and the ________?_______ phase.

Name the hormones involved in regulation of spermatogenesis.

describe how the oocyte prevents polyspermy.

Sloughing of the functional layer of the endometrium occurs because of: A) Increasing estrogen C ) Decreasing progesterone levels D ) Increasing progesterone levels

Michelle is a sexually active college student. On Saturday night, she has unprotected sex with her boyfriend. On Monday evening, she experiences the twinge of mid-cycle pain that she typically feels when she is ovulating. This makes Sherrise extremely anxious that she might soon learn she is pregnant. Is Sherrise’s concern valid? Why or why not?

Prior to fertilization, where is the male gamete located?

A baby’s gender is determined at conception, and the different genitalia of male and female fetuses develop from the same tissues in the embryo. View this animation (http://openstaxcollege.org/l/fetus) that compares thedevelopment of structures of the female and male reproductive systems in a growing fetus. Where are the testes located for most of gestational time?