This is Scientific Americans 60-Second Science, I'm Cynthia Graber. This will just take a minute. In vitro fertilization(试管受精) efforts can be helped by oddly enough oral contraceptives .That's the finding from Tel Aviv University, site of the...
Providing emergency contraception before it's needed does not affect unwanted pregnancy rate Philip Graitcer | Atlanta, Georgia 22 March 2010 Family planning experts wondered if having emergency contraceptives on hand would prevent unwanted pregnanci...
