Zoology crossword

3. which animal group is likely to have an external fertilization
6. which structure in female mammals produces eggs
7. in mammals, where does fertilization typically occur
10. in which of the menstrual cycle does ovulation occur
12. what is the term for the male reproductive cells in animals
13. which hormone is primarily responsible for maintaining the uterine lining during pregnancy
14. which of the following animals typically exhibit internal fertilization
15. what is the term for the process of an embryo attaching to the uterine wall

1. tube in what part of the female reproductive system does fertilization usually occur
2. what is the term for the process in which an embryo forms three primary layers during early development
4. in birds, the fertilized egg develops inside of a hard shell for protection, what is this type of reproduction called
5. the development of sperm occurs in which part of the male reproductive system
8. which of the following hormones is primarily responsible for stimulating ovulation in females
9. which of the following is not a mode of asexual reproduction
11. which is the following animals undergo ovoviviparity