First, read the English article below.

During a vaginal delivery the head of the baby must pass through the birth canal, through the vagina, and out of the body. During this process the head of the baby will usually press against the perineum until it stretches the tissues in this area enough for the head to pass through. Your doctor may perform an episiotomy if:  Your baby is large and needs more room to exit your body Your baby’s shoulders get stuck during the delivery Your labor is so fast that the perineum doesn’t have time to stretch before the baby is ready to come out Your baby’s heart rate indicates that the baby is in trouble and needs to be delivered as fast as possible. Your baby is in an abnormal position There are two types of incisions that your doctor can make. Both types require the same care after delivery and at home. The type of incision will depend upon your anatomy, how much room is needed, and the speed of the delivery.  A midline or median incision is made from the end of the vagina back toward the anus. These are the easiest for the surgeon to repair after the baby’s birth, but they also have the highest risk of extending or tearing back to the anus during the birth. A mediolateral incision is done at an angle from the back of the vaginal opening and away from the anus. This offers the best protection against tearing to the anus but is more painful for the woman after delivery. This type of incision is also more difficult for the surgeon to repair after the birth of the child. Let your doctor know that you want to allow enough time for the perineum to stretch on its own during birth. Ask for your doctor’s recommendations on how to reduce the need for an episiotomy.  Make sure that your wishes are noted in the birth plan that the hospital staff will follow during the delivery. You will either develop this plan in your doctor’s office or during pre-admission. During labor use a warm compress against the perineum to help the tissue to more easily stretch during delivery. Ask your doctor if you can stand or squat to push. This... 

Now, please write a short abstract for it in Vietnamese. Abstract:
Hiểu mục đích của phẫu thuật rạch tầng sinh môn trong khi sinh. Tìm hiểu về các cách phẫu thuật rạch tầng sinh môn. Cho bác sĩ biết về những lo lắng của bạn. Thực hiện bài tập Kegel để tránh phải mổ tầng sinh môn. Xoa bóp vùng đáy chậu.