20-50% chances of having osteoporosis after the age of 58-62
There are a great many varieties of estrogen. Not just one as the name would suggest. You should speak to your endocrinologist, to discuss possible side effects of the particular estrogen they prescribed to you.
Tri-cyclen Lo and Ortho Tri-Cyclen Lo are the same pill.
I know it is possible with plastic surgery and if you are overweight, weight-loss can lead to a smaller nipple size. If you are young (male or female) your nipples may be puffy or rather large...this is normal and pretty common and usually goes away with a little time. For males: to much estogen consumption can lead to big nips. :)
Progesterone counteracts the dangerous effects of excess estrogen in the body. I'm not 100% on what estrogen does, but I know birth control works by tricking the body into thinking it's already pregnant so you stop ovulating. That might be where the estrogen comes into play.