In clinical obstetrics, the gestational age is often estimated as the time from the last day of the last menstruation which is about 2 weeks before ovulation and fertilization. Pregnancy: Diagnosis, Physiology, and Care : occurs at 37–42 weeks of gestational age Gestational age The age of the conceptus, beginning from the time of fertilization. Gestational age Gestational age The age of the conceptus, beginning from the time of fertilization.Labor is defined as regular Regular Insulin uterine contractions that cause cervical dilation and effacement, leading to delivery of the fetus and the products of conception. Labor may become abnormally protracted and require augmentation, usually with oxytocin, to prevent maternal and fetal complications. The pelvic girdle, composed of 2 "hip" bones and the sacrum, is a ring-like bony structure of the axial skeleton that links the vertebral column with the lower extremities. The primary factors required for labor to progress normally are the three Ps PS Invasive Mechanical Ventilation : power (uterine contractions), passenger (the fetus), and passage (the maternal pelvis Pelvis The pelvis consists of the bony pelvic girdle, the muscular and ligamentous pelvic floor, and the pelvic cavity, which contains viscera, vessels, and multiple nerves and muscles. Placenta, Umbilical Cord, and Amniotic Cavity. The placenta produces an array of steroid, protein and peptide hormones (placental hormones). It includes a fetal portion (chorionic villi) derived from trophoblasts and a maternal portion (decidua) derived from the uterine endometrium. Labor has 3 stages: the 1st stage starts with the onset of regular Regular Insulin contractions, the 2nd stage starts with full cervical dilation, and the 3rd stage starts immediately after fetal delivery and ends with delivery of the placenta Placenta A highly vascularized mammalian fetal-maternal organ and major site of transport of oxygen, nutrients, and fetal waste products. Uterus, Cervix, and Fallopian Tubes: Anatomy, which culminates in expulsion of the fetus and the products of conception. Externally, the cervix is lined by stratified squamous cells however, the cervical canal is lined by columnar epithelium. The most inferior portion of the uterus is the cervix, which connects the uterine cavity to the vagina. Labor is the normal physiologic process defined as uterine contractions resulting in dilatation and effacement of the cervix Cervix The uterus, cervix, and fallopian tubes are part of the internal female reproductive system. Students: Educators’ Pro Tips for Tough Topics.Licensed Practical Nurse (LPN) Students.Maternity Nursing and Care of the Childbearing Family.Diversity, Equity, Inclusion, and Belonging.
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