Claim: Pregnancy can occur by sexual intercourse.

Unintended pregnancies are pregnancies that are mistimed , unplanned or unwanted at the time of conception . Unintended pregnancies may also result from rape , incest or various other forms of forced or unwanted sex .   Vaginal sexual activity without the use of contraception through choice or coercion is the predominant cause of unintended pregnancy . The incorrect use of a contraceptive method , and failure of the method chosen also contributing . Available contraception methods include use of birth control pills , a condom , intrauterine device -LRB- IUD , IUC , IUS -RRB- , contraceptive implant -LRB- implanon/nexplanon -RRB- , hormonal patch , hormonal ring , cervical caps , diaphragms , spermicides , or sterilization . Women choose to use a contraceptive method based on method efficacy , medical considerations , side effects , convenience , availability , friends ' or family members ' experience , religious views , and many other factors . Some cultures limit or discourage access to birth control because they consider it to be morally or politically undesirable .   Unintended pregnancies may be unwanted pregnancies or mistimed pregnancies . Worldwide , 38 % of pregnancies -LRB- about 80 million pregnancies -RRB- were unintended in 1999 . Unintended pregnancies are the main reason for induced abortions , resulting in about 42 million induced abortions ; not all unintended pregnancies result in abortions or unwanted children . Unintended pregnancy has been linked to numerous maternal and child health problems .