Viagra is already in use as an important pediatric cardiopulmonary drug in infants with underdeveloped lungs and circulation, as it opens up capillaries, increasing blood flow. It may have value for some adult cardiac conditions as well.
And credit where credit is due, Viagra is already being credited with saving several endangered animal species, both because it is effective in most mammals in improving reproduction rates, and because it has strongly reduced the poaching of rare animals for aphrodisiacs.
Finally, psychologists credit Viagra with reducing a lot of impotence related stress and related problems in many marriages. This means less violence and generally improved happiness among couples.
Thanks.
This might extend the use to fetal development.