For fertilization to take place,sexual intercourse must occur approximately between 1 day before and 3 days after ovulation.
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Q10: The second meiotic division in oogenesis is
Q11: Recessive genes express themselves even when they
Q12: Trophoblast cells secrete human chorionic gonadotropin,which has
Q13: The ectoderm,mesoderm,and endoderm develop during the first
Q14: How long does the pre-embryonic period last?
A)
Q16: Fertilization usually takes place in the
A) uterus
B)
Q17: The period of development after birth is
Q18: The embryonic period lasts for about six
Q19: Milk is not produced unless prolactin is
Q20: For fertilization to occur,many sperm are needed
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