| sex during, 104, 350
|
| spiral arteries during, 100, 108
|
| swelling of breasts during, 125
|
| visibility of, 339
|
| without intercourse, 46
|
| See also Birth process (parturition)
|
| Prehistory of Sex, The (Taylor), 137
|
| Premenstrual syndrome, 98, 201, 250-51
|
| Primates, nonhuman
|
| age and fertility, 218
|
| birth process, 308-9
|
| clitoral size, 62-63, 76
|
| DNA studies, 276, 334
|
|