A patient asks what the placenta develops from during early pregnancy. Which answer is correct?
Correct answer: A. The trophoblast and maternal endometrium
- A. The trophoblast and maternal endometrium
- B. The corpus luteum and cervical mucus
- C. The zona pellucida and ovarian stroma
- D. The myometrium and uterine peritoneum
Explanation
The fetal part of the placenta develops mainly from the trophoblast, while the maternal part develops from the modified endometrium. The corpus luteum supports early pregnancy but does not become the placenta.
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About Reproductive Anatomy and Conception
Female and male reproductive organs, pelvic anatomy, gametogenesis, the menstrual cycle and the hormonal control of ovulation lead into fertilisation, implantation and early embryonic development. Questions distinguish ovulation from menstruation, fertilisation from implantation, and the normal anatomical changes that allow conception and pregnancy to occur.
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