For women who have a normal menstrual cycle, conception generally occurs between the 11th and 21st day since the beginning day of the previous period. Because most women are unaware of the date of ovulation, the conception date is merely guessed in this manner. The accuracy of this method can be improved by using special ovulation tests such as basal body temperature or urine pregnancy tests. For women who have regular periods but also experience bleeding during their menstrual period (Menorrhagia), they may assume it is their last period before getting pregnant. However, this assumption is not accurate because infertility can occur even if a woman has had regular periods her entire life. Infertility can also arise after a single episode of vaginal bleeding during menstruation (Metrorrhagia). This shows that although menorrhagia and metrorrhagia are common symptoms of pregnancy, they do not guarantee that a woman is actually pregnant. Women who know they are pregnant should not eat spicy foods or drink alcohol, as these substances could cause miscarriage. Spicy foods may also cause pain and inflammation during pregnancy, so it's best to avoid them until you know how you will manage this change in your diet. Spontaneous abortions are usually due to medical causes such as infection or hormonal problems. But sometimes they are due to non-medical reasons such as emotional stress, smoking, or drinking alcohol.