If a woman's blood test reveals low estrogen levels, it may affect normal conception. Firstly, with low estrogen levels throughout the menstrual cycle, there can't be a peak change, which may lead to abnormal ovulation or anovulation. Additionally, if estrogen levels are low, the endometrium cannot proliferate effectively, leading to insufficient endometrial thickness and making it difficult for the fertilized egg to implant. Some women may conceive despite these issues; however, due to insufficient hormone levels, they may experience abdominal pain, vaginal bleeding, threatened miscarriage, or even arrested fetal development.