birth control

I didn't want to go without protection, but could I be pregnant?

anonymous
asks:
Ok, so I lost my virginity at 14. I'm 16 now, and I had unprotected sex about 2 weeks ago with my boyfriend who is 18. I didn't want to have it without a condom because I'm not on birth control, but he wanted to, and he's done so much for me in the past (not sexually), that I felt I owed him this. I told him that the only way I would have unprotected sex, he would have to pull out....

How does estrogen dose affect protection against pregnancy?

Michelle
asks:
Does the amount of estrogen in birth control pills (ex. low, high or moderate levels) have any effect on protection against pregnancy? For example, is it better to take a birth control pill with a higher level of estrogen than one of the newer "low dose" ones? Will the protection be the same?...