![]() ![]() ![]() Genes for all four globin chains are located on chromosomes 11 and 16 and are inherited – half are maternal and half are paternal. There are two genes for the two β-globin chains (one gene for each β-globin chain) and four genes for the two α-globin chains (two genes for each α-globin chain). Hemoglobin A consists of four main globin chains (two beta (β) and two alpha (α) chains: β2α2). Normal adult red blood cells contain three types of hemoglobin (Hb) with the main component being hemoglobin A (HbA). See end of chapter for details INTRODUCTION This is why it’s so important to of discuss your medical history and your feelings and fears with your doctor.By completing 4 multiple-choice questions (randomly selected) after studying this chapter readers can qualify for Continuing Professional Development awards from FIGO plus a Study Completion Certificate from GLOWM “Precipitous delivery can be psychologically traumatic for patients,” she adds. ![]() Phillips says that she often sees patients who have had precipitous labor in the past worry about subsequent experiences. (This is compared to 2.6 percent of people who had average length labors in prior pregnancies.) A study found that 7.3 percent of people who previously experienced precipitous labor had preterm births in subsequent pregnancies. “This means they may not get their preferred plan for pain management during delivery,” says Gutman. Someone who experiences precipitous labor is more likely to deliver outside of a labor and delivery setting. There may be increased difficulty delivering the placenta after a precipitous birth. Moreover, they may be more likely to face an injury, such as shoulder dystocia, notes Lin. Baby is at an increased risk for breathing in meconium during a precipitous birth. Phillips notes that this happens when the uterus doesn’t contract back down after delivery. Precipitous labor puts you at higher risk for a postpartum hemorrhage (or heavy bleeding). You may be more likely to experience vaginal tears and lacerations due to the tissue not stretching out of the way during delivery, says Kirsten Phillips, MD, an ob-gyn at Corewell Health in Grand Rapids, Michigan. Things happen fast in a precipitous labor. Of course, those who have a prior history of precipitous labor are even more at risk. ![]() To this point, Lin says that precipitous birth is more common among people who’ve had a previous vaginal delivery. Subsequent pregnancies tend to have speedier deliveries. High blood pressure or preeclampsia puts you at greater risk for experiencing precipitous labor. If the placenta separates from the wall of the uterus, a precipitous delivery may occur, says Sarah Gutman, MD, an ob-gyn and assistant professor of clinical obstetrics and gynecology at Penn Medicine in Philadelphia. **Baby’s size.**A smaller baby may lend itself to a precipitous delivery, notes Tang.A wide pelvis may also more readily facilitate an efficient labor and delivery. For example, a birthing person’s cervix could be soft and may dilate more easily. “Precipitous labors mostly occur when there’s less resistance of the birth canal,” explains Alexander Lin, MD, an ob-gyn at Northwestern Medicine Palos Hospital in Illinois. ![]()
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