Final answer:
The purpose of pelvimetry with placental placement is to measure the pelvis and to determine the placenta position, which aids in planning a safe delivery. The proper expulsion of the afterbirth is critical to prevent postpartum hemorrhage, and breastfeeding facilitates the involution process.
Step-by-step explanation:
The purpose of an obstetric patient coming in for a pelvimetry with placental placement is multifaceted. The first objective, pelvimetry, is to measure the size and shape of the pelvis, which is critical for assessing the potential for a vaginal delivery. The second part involves determining the position of the placenta, which is important for identifying conditions like placenta previa. Both of these assessments are essential to planning for a safe delivery and to foresee and prepare for potential complications during childbirth.
During the third stage of labor, after the baby is born, the delivery of the afterbirth (placenta and associated membranes) marks the final stage of childbirth. If the placenta does not birth spontaneously or if fragments remain, there may be risks such as postpartum hemorrhage. The involution process that includes uterine contractions to return it to pre-pregnancy size also encourages the abdominal organs to return to their pre-pregnancy locations. Breastfeeding helps in this involution process.