Simple: cycle - tracking apps that can help you and your partner perfectly time that all - important roll in the hay to the days you're most likely to conceive. (health.com)
Estrogen has a very important roll in regulation of the menstrual cycle, but it is also involved in functions of the heart, blood vessels, bones, breasts, skin, hair, mucus membranes, pelvic muscles and the brain. (naturallybetter.com)
Looking at the chart above, I can't help but wonder which factor (s) will ultimately play the most important roll in determining what tablet a consumer ends up buying. (crackberry.com)