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Across 3. Fluid surrounding the fetus which regulates the temperature and prevents skin abrasions 6. Embryonic membrane which produces hCG and becomes the primary portion of the placenta 8. Structure formed through the process of cleavage 11. The diploid cell formed when a sperm fuses with a secondary oocyte 12. Process of the blastocyst embedding into the endometrium 15. The process which increases the number of cells in an embryo, but not the size or volume 18. Embryonic membrane which is the source of blood and germ cells 20. Fluid secreted by the mammary glands after birth which contains proteins and antibodies to help with the immune system 21. Hollow ball of cells the morula develops into as it moves into the uterus 24. Hormone produced by the blastocyst which prevents the corpus luteum from breaking down 25. Hormone which allows flexibility of the pubic symphysis and dilates the cervix

Down 1. Embryonic membrane which forms a cavity around the embryo filled with fluid 2. Hormone which prepares the mammary glands for lactation 4. Outer layer of the blastocyst which develops into the chorion and eventually the placenta 5. Germ layer which produces the muscles, bones, circulatory system, and lungs 7. Structure which forms from the chorion and endometrium which allows diffusion of gases and nutrients to the fetus 9. Germ layer which produces the epidermis and nervous system 10. Connection between the mother and fetus which contains arteries and veins for blood exchange 13. Primary hormone involved in lactation 14. Embryonic membrane which develops into the umbilical cord 16. Hormone which falls in order for labor to begin 17. Process of the blastocyst developing the three germ layers 19. Hormone which stimulates milk later after nursing begins 22. Germ layer which produces the lining of the GI and respiratory tracts 23. The process of a sperm penetrating a secondary oocyte