Part of REP-02 — Human Reproduction

Common Errors in Human Reproduction — Error Analysis

by Notetube Official257 words4 views

Top 15+ Misconceptions and Corrections

Wrong BeliefCorrection
"Fertilization occurs in the uterus"Fertilization occurs in the AMPULLA of the fallopian tube
"FSH triggers ovulation"LH surge triggers ovulation (FSH triggers follicle growth)
"A mature ovum is released at ovulation"A secondary oocyte (arrested at metaphase II) is released at ovulation
"Primary oocyte is arrested at metaphase II"Primary oocyte is arrested at prophase I; secondary at metaphase II
"Meiosis II completes at ovulation"Meiosis II completes only upon sperm penetration
"Sertoli cells secrete testosterone"Testosterone is secreted by Leydig cells (interstitial cells)
"Leydig cells are inside seminiferous tubules"Leydig cells are in interstitial spaces between tubules
"4 functional eggs from one oocyte"Only 1 functional ovum (+ 2–3 polar bodies)
"Corpus luteum secretes FSH"Corpus luteum secretes progesterone (and some estrogen)
"hCG is secreted by the ovary"hCG is secreted by the trophoblast after implantation
"Implantation occurs at day 14"Implantation occurs day 6–7 after fertilization (~day 20–21 of cycle)
"Prolactin triggers milk ejection"Prolactin = milk production; oxytocin = milk ejection
"Spermatogenesis takes 28 days"Spermatogenesis takes ~64 days
"Prostate provides most of semen volume"Seminal vesicles provide ~60%; prostate ~30%
"Isthmus is the fertilization site"Ampulla is the fertilization site; isthmus connects to uterus

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