Zoology - Human Reproduction Question with Solution | TestHub
From the following statements about the menstrual cycle, which two are correct?
(i) Lack of menstruation may be indicative of pregnancy.
(ii) The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones only.
(iii) LH surge induces ovulation.
(iv) If fertilization occurs, the corpus luteum degenerates immediately.
Options:
Answer:
Solution:
Lack of menstruation in a normal female may be indicative of pregnancy. During pregnancy, the levels of estrogen and progesterone are high in the blood, which is required for the maintenance of uterus and thus, menstruation does not occur, On the 14thday of the menstrual cycle, there is a rapid increase in LH (called LH surge), that induces ovulation. The changes in the ovary and the uterus are induced by changes in the levels of ovarian hormones and pituitary hormones. If fertilisation occurs, corpus luteum degenerates by the 16thweek of pregnancy.
