But, sometimes your heart gets out of rhythm. An irregular or abnormal heartbeat is called an arrhythmia. An arrhythmia (also called a dysrhythmia) can involve a change in the rhythm, producing an uneven heartbeat, or a change in the rate, causing a very slow or very fast heartbeat.
The placenta is an organ that provides nutrients to your baby while youâre pregnant. Its typical location is in the upper part of the uterus, and it normally detaches from the uterine wall after you deliver your baby. However, in the case of placental abruption, the placenta detaches too early. This can cause complications, because your baby may not get enough oxygen or nutrients. You can also experience bleeding thatâs harmful to you and your baby.
Nutrients and oxygen from the motherâs blood are transferred to the fetal blood, while waste products are transferred from the fetal blood to the maternal blood, without the two blood supplies mixing. The placenta is expelled from the uterus in a process called the after-birth. One possible problem in pregnancy is placenta previa, where the placenta is attached near or over the cervix.