Dr. Chapa’s OBGYN Clinical Pearls

Around a third of a person’s life is spent asleep. Previous studies have reported an association between sleep disordered breathing, like OSA, and pregnancy complications such as pre-eclampsia, gestational diabetes, and preterm birth. We recently discussed a stillbirth bundle from Australia which includes patient education on sleeping practices and stillbirth risk. Does maternal sleeping position...

Internal manual aortic compression is a procedure that may be used intraoperatively in the management of massive pelvic bleeding. But what about EXTERNAL aortic compression? In February’s 2025 AJOG (Grey Journal), under their Surgeon’s Corner section, there will be a very nice video recap of an easy to adopt maneuver which may “buy time” in OB hemorrhage cases as surgical intervention is being pla...

Mesenchymal stem cells (MSCs) are multipotent adult stem cells which can differentiate into multiple cell types. MSCs can be isolated from the bone marrow, umbilical cord blood, adipose tissue, muscle, and dental pulp. However, the use of these MSCs involves a number of barriers. Human umbilical cord is limited to collection at birth. Bone marrow and fat biopsy are painful and requires general ane...

Tachycardia in pregnancy is common and distinguishing between physiological and pathological causes can be a challenge. Plus, until recently, there had not been a well-defined or universally accepted definition of the upper limit of normal for heart rate in pregnancy. But a study published in 2020 from the Green Journal, from the NHS in London has shed light on this issue. The finding of persisten...

The stillbirth rate in the US is considerably higher than in many countries with similar resources. In 2021, the United States stillbirth (loss before birth at ≥20 weeks’ gestation) ratio was 5.73 per 1000 births or 1 in 175 pregnancies with 21,000 stillbirths occurring annually. Contrast that to the rate in Japan which is 1.6/1000! The UK and Australia have both implemented stillbirth prevention...

Guillain-Barré syndrome (GBS) is a rare disorder that causes muscle weakness and sometimes paralysis. It's caused by the body's immune system damaging nerves. While most cases are triggered by respiratory or gastrointestinal infections, vaccinations have also been linked to GBS pathogenesis. GBS can last from weeks to years, but most people start to recover within a few weeks. The earlier symptoms...

Sometimes you read a new study and you just have to say, "You Don't Say?!" In this episode, we will highlight 2 publications which were released Dec 26. 2024 and Jan 6, 2025 which make you say just that. This is a brief, fun, YET STILL EDUCATIONAL, episode...Listen in for details.

In this episode, we will cover 2 topics: the first is brand new in print (01/06/2025 ), and the second is just weird. In the “new” portion we'll summarize a new randomized study published in JAMA Network dealing with gestational diabetes. Should we add glyburide to metformin for GDM control? Listen in for details. In the second portion, we'll focus on unilateral ovarian absence not related to prev...

Preterm infants, especially those born at periviability, are at inherent risk of a variety of short-term neonatal complications- depending on their gestational age- including sepsis, respiratory distress, IVH, and have an overall higher mortality compared to term born infants. Well known interventions are intended to reduce these complications; these include antenatal corticosteroids, magnesium su...

In most regions of the United States, RSV season starts in the fall and peaks in the winter. In September 2023, the ACOG released a Practice Advisory recommending a single dose of Pfizer’s RSV vaccine (Abrysvo) for eligible pregnant individuals between 32 0/7 and 36 6/7 weeks of gestation who do not have a planned delivery within 2 weeks, using seasonal administration, to prevent RSV lower respira...

In August 2024, researchers at Columbia University published a study that found measurable concentrations of 16 metals in multiple brands of tampons. The study evaluated levels of metals like cadmium, manganese, and arsenic in 30 tampons across 14 different brands. The study concluded that using tampons may be a potential source of metal exposure. We covered this publication in JULY 2024 before it...

Low-dose aspirin (LDA), typically prescribed at a dosage of 81 mg daily, is primarily used during pregnancy to prevent or delay the onset of preeclampsia. However, the question of whether to continue LDA postpartum is less clear and requires careful consideration of the benefits and risks associated with its use in the postpartum period. After all, the American College of Cardiology and American H...

Somethings in medicine are pretty cut and dry. Others...not so much. Such is the case with obstetrical management of PPROM with a cervical cerclage in place. Should it be removed, or left in place? While the ACOG has some guidance from March 2020, there has been additional publications released, including one from SMFM. PLUS, a November 2024 review on the topic (AJOG MFM) has suggested a practical...

In late 2024, the CDC updated their MEC on contraception in those with medical co-morbidities. Obesity (BMI >/= 30) was also referenced in that revision. NOW, coming out officially in 2025, The Society of Family Planning has released their committee statement on "contraception and body weight". Is there a certain BMI class where a type of BC is contraindicated? Does BC make you fat?! Listen in...

We have made SIGNIFICANT progress in our ability to screen for fetal RH factor using cell free DNA from maternal blood. Cell-free DNA to determine the fetal RHD genotype from the maternal circulation was first described in 1993. We have come so far since them. In March 2024, the ACOG released a Practice Advisory stating, “the use of NIPT to prioritize use of RhIg and conserve RhIg supply is a reas...

The saying says, “The Devil is in the details”. This idiomatic phrase that means even the grandest project depends on the success of the smallest components. So is the case with low dose ASA for preeclampsia prevention. Currently, the ACOG states, “Low-dose aspirin (LDA) (81 mg/day) prophylaxis is recommended in women at high risk of preeclampsia and should be initiated between 12 weeks and 28 wee...

EVERYTHING CHANGES! So true. And now, the USPSTF has changed (UPDATED) their recommendations for cervical cancer screening in regards to HPV primary screening. This is BRAND NEW, within the last 24 hours. Primary HPV screening for cervical cancer has gained a lot of steam and is progressing quickly. The FDA approval of “dual stain” testing of hrHPV positive results, the recent FDA approval for pat...

Well, in this episode we have 2 very interesting and challenging clinical situations. These come from real world clinical encounters so we thought we would share these with you because they are brain teasers and should be discussed. They both have to do with OB ultrasound. First, is there a “minimal” CRL to estimate gestational age? In other words, is there a CRL that is too small to be accurate?...

Acetaminophen (Paracetamol) is a common over-the-counter medication that has gained substantial media attention regarding its use by pregnant women. Although estimates vary considerably, most studies and surveys report that around 40–65% of women take acetaminophen sometime during their pregnancy. Historically considered safe, concern was initially raised back in 2014 with a JAMA Pediatrics public...

In November 2013, ACOG issued the Hypertension in Pregnancy Task Force Report recommending daily low-dose aspirin (81mg) beginning in the late 1st trimester for women with a history of early-onset preeclampsia and preterm delivery at less than 34 0/7 weeks, or for women with more than one prior pregnancy complicated by preeclampsia. The following year, the USPSTF published a similar guideline, alt...

The first successful births from frozen eggs were twins, born in Australia in 1986. IVF serves a valuable role for those with persistent infertility issues or other conditions where natural conception is hindered. Although oocyte cryopreservation was initially used as a fertility preservation strategy for medical indications, currently, it is increasingly used to circumvent age-related infertility...

Introducing one of our Senior Residents, Dr. Mauldin: Dr. Mauldin just told me of a real patient encounter she had just today, that I felt we HAD to share with everyone. This real encounter is WHY we are passionate about EVIDENCE-BASED medicine! PLUS, we will introduce our NEXT episode which will focus on "elective egg harvesting and freezing" for young women who may have "delayed fertility" due t...

In the United States, more than 400,000 babies are born prematurely each year, which is about 1 in 10 babies. Over the last several decades, multiple studies have shown a link between poor oral health and increased occurrence of preterm birth. Researchers have looked at various ways to improve dental health during pregnancy, including doing a “deep-teeth cleaning” (also called ‘scaling and planing...

The U.S. Preventive Services Task Force and the World Health Organization recommend primary HPV screening, starting at age 25, as an option (some as preferred) for cervical cancer screening. Although primary HPV screening is as effective as cotesting at detecting cervical cancer, primary HPV screening decreases the number of lifetime screenings needed. The primary HPV screening tests approved by t...

With an estimated 3.8 million breast cancer survivors in the United States, OBGYNs and other women's healthcare providers often are on the front lines of addressing survivorship issues, including the hypoestrogenic-related adverse effects of cancer therapies or early menopause in survivors. Although systemic and vaginal estrogen are used widely for symptomatic relief of genitourinary syndrome of m...