If any one OR more of the following criteria are met AND there are no signs or symptoms of pregnancy:
1) She has not had intercourse since the start of her last normal ( natural) menstrual period, since childbirth, abortion, miscarriage, ectopic pregnancy or uterine evacuation for gestational trophoblastic disease
2) She has been correctly and consistently using a reliable method of contraception ( Barrier method can be considered reliable PROVIDED they had been used consistently and correctly for every episode of intercourse)
3) She is within the first 5 days of the onset of a normal (natural) menstrual period
4) She is less than 21 days postpartum ( Non Breastfeeding women)
5) She is fully Breastfeeding, amenorrhoeic AND less than less than 6 months postpartum
6) She is within the first 5 days after abortion, miscarriage, ectopic pregnancy or uterine evacuation for gestational trophoblastic disease
7) She has not had intercourse for MORE THAN 21 days AND has a Negative high-sensitivity urine pregnancy test (able to detect hCG levels around 20 mIU/ml)