Trying to conceive is a heck of a journey — there are more ups and downs than a ride at Disney World, and half of it seems more based on superstition than logic and science. But some things are pure science, and can make you question everything. Like, how long does it take to get a positive pregnancy test? Are those tests that are purportedly designed to accurately test for pregnancy up to five days before your missed period worth it, or should you wait it out?
Home pregnancy tests (HPTs), may all look slightly different, and give you the results in different ways, but they are all testing for the same hormone — human chorionic gonadotropin (hCG). That is the definitive pregnancy hormone. It is only found in pregnant women, and varies in levels throughout the pregnancy. According to the Journal of Reproductive and Biological Endocrinology, hCG is the hormone that begins the process of forming the placenta around the zygote, and attaches it to the walls of the uterus.
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