Fill in each blank from memory before checking:

1. Spermatogenesis occurs in the __________ tubules; supported by __________ cells.
2. Testosterone is secreted by __________ cells located in the __________ spaces.
3. The primary oocyte is arrested at __________ from __________ life.
4. The secondary oocyte is arrested at __________ and completes meiosis only when __________.
5. Ovulation is triggered by the __________ surge on approximately day __________.
6. Fertilization occurs in the __________ of the fallopian tube.
7. Implantation occurs in the __________ approximately __________ days after fertilization.
8. The __________ (outer blastocyst layer) forms the placenta; the __________ forms the embryo.
9. __________ secreted by the trophoblast maintains the __________ during early pregnancy.
10. Parturition is initiated by __________ from the __________ pituitary via __________ feedback.
11. Milk production is stimulated by __________; milk ejection by __________.
12. Seminal vesicles contribute ~__________ % of semen volume and contain __________ as energy for sperm.
13. The __________ cell-only syndrome results in infertility with normal testosterone (absent __________ cells).
14. Human pregnancy lasts approximately __________ days from fertilization.
15. The cortical reaction prevents __________ by modifying the __________.

Answers:

1. seminiferous; Sertoli | 2. Leydig; interstitial | 3. prophase I; fetal | 4. metaphase II; sperm penetrates | 5. LH; 14 | 6. ampulla | 7. endometrium; 6–7 | 8. trophoblast; inner cell mass | 9. hCG; corpus luteum | 10. oxytocin; posterior; positive | 11. prolactin; oxytocin | 12. 60; fructose | 13. Sertoli; Sertoli | 14. 266 | 15. polyspermy; zona pellucida