Women who have lost a pregnancy before should avoid doing high levels of physical activity while trying to conceive again. A new study has warned high-strain activity in the earliest stage of pregnancy or around the time of trying to conceive can increase your risk of miscarriage or early pregnancy loss. It can be difficult to detect subclinical or very early pregnancy loss because they may occur before a woman is even aware that she's pregnant. Subclinical losses can be detected only from hCG testing in biospecimens. A rise in the hormone hCG is one of the earliest indicators of