Two Week Wait (2WW)

Definition - What does Two Week Wait (2WW) mean?

The two week wait (TWW or 2WW) refers to the estimated period of time between a pregnancy attempt and the date where it is most likely that a pregnancy test is able to accurately indicate if the attempt was successful or not.

FertilitySmarts explains Two Week Wait (2WW)

If an egg is successfully fertilized through intercourse, it takes approximate 6-10 days after ovulation for a fertilized egg implant within the uterine lining. Human chorionic gonadotropin (hCG) is a hormone that is produced in pregnancy by the placenta that finds it's way into the bloodstream almost immediately after an embryo implants. Many pregnancy tests work by detecting hCG levels in urine or blood. It takes 7-12 days after fertilization for hCG to be detected in blood, or by 12-14 days after fertilization to be detected in urine.

The so-called 2WW is inspired by the 14 day time frame that it generally takes for a home pregnancy test to detect adequate levels of hCG in urine.

The pregnancy is not achieved, the 2WW will end with the start of a menstrual period.

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