Hormones, Egg & Fertilization Timing

What happens after ovulation: egg lifespan, fertilization limits, and biological timing

What happens after ovulation: egg lifespan, fertilization limits, and biological timing

The first hours after ovulation is the release of a mature oocyte, commonly called an egg, from a dominant ovarian follicle. Once released, the egg does not simply drift randomly through the pelvis. The fimbriae, finger-like projections at the end of the fallopian tube, help sweep the egg toward the tubal opening. Ciliary movement, tubal […]

Hormones in ovulation: LH surge, estrogen, progesterone, and fertile window timing

Hormones in ovulation: LH surge, estrogen, progesterone, and fertile window timing

The menstrual cycle as a coordinated endocrine system The ovulatory menstrual cycle is usually described in phases: follicular, ovulatory, and luteal. Underneath those labels is a dynamic feedback system involving the hypothalamus, pituitary gland, ovaries, endometrium, cervix, and fallopian tubes. The hypothalamus releases gonadotropin-releasing hormone in pulses, which stimulates the pituitary to secrete follicle-stimulating hormone […]