Some of the most common symptoms that mothers-to-be experience in their second month of pregnancy are nausea, frequent urination, fatigue, darkness of the nipples and general breast tenderness or soreness. Nausea, which is frequently referred to as morning sickness, can actually be experienced at any time of the day or night during a pregnancy, according to WebMD.
Other notable occurrences during the second month of pregnancy, explains WebMD, are the initial growth stages of some of the baby's major organs. The baby is still quite tiny, but the brain, muscles, heart, spinal cord and bones are starting to develop. As these changes are happening, the baby also gets connected to the mother's blood supply through the formation of the umbilical cord. The placenta is developing at this time as well. The placenta and the amniotic sac help to nourish and protect the baby while it is in utero. The fluid environment within the amniotic sac allows for the baby's comfort and ease of movement.
Planned Parenthood defines the second month of pregnancy as the embryonic stage and explains that it lasts for about five weeks. In the latter part of this stage, in weeks seven and eight of the pregnancy, webbed fingers and toes begin to develop and the sex organs become either male or female.