What changes take place during days 16-28 of the menstrual cycle?
Correct answer: A. Uterine wall is prepared for implantation of embryo
- A. Uterine wall is prepared for implantation of embryo
- B. Menstrual flow
- C. Levels of estrogen fall
- D. Ovulation
Explanation
The time duration of days 16-28 is known as the luteal phase. During this time, the uterine wall is prepared for the implantation of the embryo under the influence of progesterone secreted by the corpus luteum. If pregnancy is established, the corpus luteum continues secreting progesterone under the effect of human chorionic gonadotropin. If the embryo is not implanted, the corpus luteum degenerates, and all hormone levels fall resulting in the onset of the menstrual period.
Last updated
About Reproduction
Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
Practise Reproduction
1,220 free Reproduction MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
2nd meiotic division in the oocyte is completed during the?
50 secondary oocytes in females and 50 secondary spermatocytes in males give rise to:
50 secondary spermatocytes and 50 secondary oocytes will give rise to
A carpel is a leaf which has been modified to produce:
A change in the amount of yolk and its distribution in the egg will affect: