Answer: Days 1-13 when FSH stimulates follicle growth and estrogen rises, preparing the endometrium for possible implantation.
- A Days 15 through 28 occurring after ovulation, dominated largely by corpus luteum activity under most conditions encountered
- B Days 1-13 when FSH stimulates follicle growth and estrogen rises, preparing the endometrium for possible implantation
- C The brief phase during which most of the endometrial lining sheds away gradually as frequently observed in practice
- D The specific phase during which the blastocyst embeds itself into the endometrial wall over several days in many documented cases
Correct answer: B. Days 1-13 when FSH stimulates follicle growth and estrogen rises, preparing the endometrium for possible implantation
Explanation: Follicular phase (days 1-13): FSH from pituitary stimulates follicle development in ovary; growing follicle secretes estrogen; estrogen causes endometrium to thicken; rising estrogen eventually triggers LH surge and ovulation at day 14.
The human male reproductive system: sperm formed in the testis mature in the epididymis and travel via the vas deferens, mixing with secretions of the seminal vesicle, prostate and bulbourethral glands. Image: Wumingbai, CC BY-SA 4.0, via Wikimedia Commons.
Concept context
Male and female reproductive systems, gametogenesis, fertilization, implantation, pregnancy, and reproductive health.