A limited amount of manipulation is safe during pregnancy. Details and degree of manipulation should be discussed with a perinatologist. The sex of the baby can be determined at 15-16 weeks gestation in most cases, depending on the position of the baby. Determining if twins are identical should be performed by an ultrasound examination during the first part of pregnancy and at 18-20 weeks gestation. This is done by evaluating the placenta, membranes, and fetal gender.
Some twins require blood type or DNA testing after delivery to determine if they are identical.
Labor results from persistent contractions which cause dilation of the cervix. You will know if you are having contractions if your abdomen hardens and relaxes every 5-7 minutes. Other signs and symptoms of labor include back pain, pelvic pressure, and vaginal bleeding. If you have any of these signs or symptoms and you are less than 35 weeks gestation, call the perinatologist. The information appearing on the Des Moines Perinatal Center website is presented for educational purposes only.