Good preparation for pregnancy is essential. Because the fertility period occurs two weeks before your period, three weeks may go by before you find out if you’re pregnant or not. The most critical period for your baby is between your second and eighth week of pregnancy, a time during which the face and organs such as the heart and kidneys are forming. Your lifestyle and habits (diet, smoking, alcohol consumption) may affect the baby. It is preferable to adopt a pregnant woman’s lifestyle before your pregnancy is confirmed.