The use of sex hormones 17beta-estradiol and progesterone as medication for contraceptives and menopausal medication is universally common in female populations. Prevalent studies have shown both positive and negative effects of exposure to increase . . .

Assistance for women who have difficulty conceiving often relies on in vitro fertilization technology. The number of "test-tube babies" born is increasing each year around the world, but the success rate remains low and might be improved by enhanced m . . .

Literature focusing on the reproductive mechanisms in bears is often limited and only has a narrow scope. However, with six out of eight bear species being considered threatened or endangered, it seems critical that more information about reproduction . . .