How effective is Plan B after ejaculation?
Plan B, also known as the morning after pill, is an emergency contraceptive which can be used to prevent pregnancy when taken within 72 hours of unprotected sex. Studies have shown that Plan B is effective in preventing pregnancy after ejaculation in most cases, but the effectiveness decreases the more time that passes after ejaculation. It is also less effective in women who weigh over 176 pounds. It is important to note that Plan B does not protect against sexually transmitted infections and should not be used as a regular form of contraception.