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Fast Facts
A brief refresher with useful tables, figures, and research summaries
Preconception Care and Pregnancy
Preconception Care
Preconception counseling: Many women seek advice from their primary care physician before trying to conceive. Preconception counseling includes the following:
review of medications for teratogenic risks
ensuring chronic conditions are well controlled
recommending folic acid supplementation
ensuring vaccines are up to date, including influenza and Covid-19
assessment for dangerous environmental exposures, including Zika virus
discussion of family genetic history
screening for depression and anxiety disorders; intimate partner violence; and alcohol, tobacco, and illicit drug use
Recommendations for Preconception Counseling and Care is a comprehensive guide developed by the American Academy of Family Physicians (AAFP).
Key considerations prior to pregnancy:
Folic acid supplementation: All women contemplating pregnancy (and all women using inadequate contraception who are at risk of pregnancy) should begin a folic acid supplement to reduce the risk of neural tube defects.
Immunization status: Consider screening for varicella and rubella with routine labs before conception because live vaccines can’t be administered during pregnancy.
Medication reconciliation: A thorough medication reconciliation should be performed, with discontinuation or replacement of medications that are known to be teratogenic and encouragement to continue medications that are clinically necessary.
For more guidance and information on medication safety during pregnancy, see Over-the-Counter Medications in Pregnancy and the table below of AAFP medication guidelines for common medical conditions in women considering pregnancy:
![[Image]](content_item_media_uploads/r360.i002353_fig001.png)
(Source: Recommendations for Preconception Counseling and Care. Am Fam Physician 2013. Reprinted with permission.)
Pregnancy
Comanagement of Medical Issues during Pregnancy
It is important to know how to manage chronic medical problems, such as diabetes, hypertension, depression, asthma, and hyperlipidemia throughout pregnancy. See the table above and the reviews and guidelines associated with this rotation guide for more information on the management of specific conditions, including diabetes, chronic hypertension, asthma, venous thromboembolism, and depression. Keep in mind the following general points:
Contraindications: Some medications commonly used to treat these conditions are contraindicated in pregnancy.
Dose adjustment: The dose of some medications (e.g., levothyroxine) needs to be increased during pregnancy.
Pain management: Acetaminophen is generally considered safe, but nonsteroidal anti-inflammatory drugs (NSAIDs) should be avoided in pregnancy.
Medication exposure during breastfeeding: After delivery, breastfeeding mothers often have similar questions and concerns about medication safety. The National Library of Medicine’s Drug and Lactation Database (LactMed) provides information on drug safety during breastfeeding and suggests therapeutic alternatives.
Covid-19 vaccination in pregnancy: The Centers for Disease Control and Prevention (CDC) recommends that all persons older than 6 months, including pregnant, recently pregnant, and lactating individuals, complete a primary two-vaccine Covid-19 series followed by an updated booster vaccine.
First-Trimester Bleeding
Some women with confirmed pregnancy present to the primary care office with first-trimester bleeding. The following algorithm is a helpful guide for the evaluation of patients with bleeding during the first trimester:
![[Image]](content_item_media_uploads/r360.i002353_fig002.jpg)
(Source: Reproductive Health Access Project 2017.)
For more information on complications of pregnancy (including ectopic pregnancy and preeclampsia/eclampsia/HELLP syndrome, see Abdominopelvic Emergencies in the IM Emergency Medicine rotation guide.
Research
Landmark clinical trials and other important studies
Tita AT et al. N Engl J Med 2022.
In this multicenter randomized trial, targeting a blood pressure less than 140/90 mm Hg in pregnant women with mild chronic hypertension was associated with better pregnancy outcomes than a strategy of reserving treatment only for severe hypertension, with no increase in the risk of small-for-gestational-age birth weight.
![[Image]](content_item_thumbnails/r360.i002353_res1.jpg)
Fell DB et al. JAMA 2022.
In this Canadian retrospective cohort study, Covid-19 vaccination during pregnancy, compared with vaccination after pregnancy and with no vaccination, was not significantly associated with increased risk of peripartum complications.
![[Image]](content_item_thumbnails/r360.i002353_res2.jpg)
Dagan N et al. Nat Med 2021.
This Israeli observational cohort study demonstrated high Covid-19 vaccine effectiveness similar to the general population in pregnant women.
![[Image]](content_item_thumbnails/r360.i002353_res3.jpg)
Coomarasamy A et al. N Engl J Med 2019.
The administration of progesterone did not improve the incidence of live births in women with bleeding in early pregnancy.
![[Image]](content_item_thumbnails/r360.i002353_res4.jpg)
Landon MB et al. N Engl J Med 2009.
In this randomized controlled trial, treatment of mild gestational diabetes did not reduce the risk of stillbirth or perinatal death or several neonatal complications, but it did reduce the risks of fetal overgrowth, shoulder dystocia, cesarean delivery, and hypertensive disorders.
![[Image]](content_item_thumbnails/r360.i002353_res5.jpg)
Meador KJ et al. N Engl J Med 2009.
In this prospective, observational, multicenter study, in utero exposure to valproate was associated with an increased risk of impaired cognitive function at 3 years of age.
![[Image]](content_item_thumbnails/r360.i002353_res6.jpg)
The HAPO Study Cooperative Research Group. N Engl J Med 2008.
The HAPO study found an association between maternal glucose levels and increased birth weight.
![[Image]](content_item_thumbnails/r360.i002353_res7.jpg)
Czeizel AE and Dudás I. N Engl J Med 1992.
This landmark randomized controlled trial demonstrated that periconceptional folate-containing vitamin use decreased the incidence of a first occurrence of neural-tube defects.
![[Image]](content_item_thumbnails/r360.i002353_res8.jpg)
Reviews
The best overviews of the literature on this topic
Shook LL et al. Obstet Gynecol 2023.
![[Image]](content_item_thumbnails/r360.i002353_rev1.jpg)
Kalafat E et al. Am J Obstet Gynecol 2022.
![[Image]](content_item_thumbnails/r360.i002353_rev2.jpg)
Wesley BD et al. Am J Obstet Gynecol 2021.
![[Image]](content_item_thumbnails/r360.i002353_rev3.jpg)
Greer IA. N Engl J Med 2015.
![[Image]](content_item_thumbnails/r360.i002353_rev4.jpg)
Kourtis AP et al. N Engl J Med 2014.
![[Image]](content_item_thumbnails/r360.i002353_rev5.jpg)
Servey J and Chang J. Am Fam Physician 2014.
![[Image]](content_item_thumbnails/r360.i002353_rev6.jpg)
Doubilet PM et al. N Engl J Med 2013.
![[Image]](content_item_thumbnails/r360.i002353_rev7.jpg)
Stewart DE. N Engl J Med 2011.
![[Image]](content_item_thumbnails/r360.i002353_rev8.jpg)
Seely EW and Ecker J. N Engl J Med 2011.
![[Image]](content_item_thumbnails/r360.i002353_rev9.jpg)
Schatz M and Dombrowski MP. N Engl J Med 2009.
![[Image]](content_item_thumbnails/r360.i002353_rev10.jpg)
Guidelines
The current guidelines from the major specialty associations in the field
Garovic VD et al. Hypertension 2022.
![[Image]](content_item_thumbnails/r360.i002353_guide1.jpg)
American Diabetes Association. Diabetes Care 2020.
![[Image]](content_item_thumbnails/r360.i002353_guide2.jpg)
Farahi N and Zolotor A. Am Fam Physician 2013.
![[Image]](content_item_thumbnails/r360.i002353_guide3.jpg)
Additional Resources
Videos, cases, and other links for more interactive learning
National Institute of Child Health and Human Develoment 2006.
![[Image]](content_item_thumbnails/r360.i002353_ar1.jpg)