Free Reproduction MCQs with Answers

61. In a normal 28 days menstrual cycle when would you expect the LH surge to occur?

• A. Days 7-10
• B. Days 11-14
• C. Days 15-18
• D. Days 19-22

Explanation: Ovulation falls at about day 14, and the LH surge precedes it by roughly a day, so it lies in the window from day 11 to 14. The luteal phase after ovulation is the fixed part of the cycle at about fourteen days, which is why counting back from the next expected period is the reliable method. Days 15 to 22 fall after ovulation, when progesterone dominates.

62. The bacterium Treponema pallidum is responsible for which sexually transmitted disease?

• A. Syphilis
• B. Chlamydia
• C. Gonorrhea
• D. Genital herpes

Explanation: Treponema pallidum is the spiral bacterium, or spirochaete, that causes syphilis, a disease progressing through primary, secondary, latent and tertiary stages over many years if untreated. Gonorrhoea is caused by the diplococcus Neisseria gonorrhoeae and chlamydia by Chlamydia trachomatis. Genital herpes is viral and therefore not treatable with antibiotics at all.

63. The process of spermatogenesis occurs in which part of the male reproductive system?

• A. Seminiferous tubules
• B. Vas deferens
• C. Scrotum
• D. Epididymis

Explanation: The germinal epithelium lining the seminiferous tubules divides by mitosis and then meiosis to produce spermatids, which mature into spermatozoa. The epididymis stores sperm and gives them motility after they leave the testis, so it is the closest distractor but hosts no division. The scrotum is the sac holding the testes, keeping them a few degrees below core temperature.

64. Which layer of uterus nourishes the embryo after implantation?

• A. Cervical epithelium
• B. Myometrium
• C. Endometrium
• D. Perimetrium

Explanation: The endometrium is the inner glandular lining, thickened and richly supplied with blood by progesterone, and it is where the blastocyst implants and from which the maternal part of the placenta develops. The myometrium is the thick smooth muscle whose contractions expel the baby at birth, and the perimetrium is the outer covering. Shedding of the endometrium is what menstruation consists of.