Trimesters & Key Milestones
 

Pregnancy typically lasts around 40 weeks, typically based on the first day of your last menstrual period (LMP) or sometimes based upon ultrasound findings. It is divided into three distinct trimesters.  All women should follow with an OB-GYN 

First Trimester (Weeks 1 to 12)
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• Common Symptoms: Morning sickness (nausea/vomiting), extreme fatigue, breast tenderness, frequent urination, mood shifts, and food aversion or cravings.

• Key Focus: Initial prenatal visits, dating ultrasound, baseline blood work, starting daily prenatal vitamins, and establishing vaccine history.

Second Trimester (Weeks 13 to 27)
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• Common Symptoms: Energy often returns and nausea decreases. Physical changes include an expanding belly, mild backaches, leg cramps, heartburn, and skin changes (linea nigra). Fetal movements ("quickening") around 18–22 weeks.

• Key Focus: Anatomy scan ultrasound (around 18–20 weeks), gestational diabetes screening (around 24–28 weeks), and initial vaccine timing.

Third Trimester (Weeks 28 to 40+)
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• Common Symptoms: Shortness of breath, pelvic pressure, frequent urination, trouble sleeping, swollen ankles (edema), and practice contractions (Braxton Hicks).

• Key Focus: Frequent checkups, kick counts, group B strep (GBS) screening, third-trimester vaccinations (Tdap, RSV), and birth planning.

High-Risk Pregnancy
 

A pregnancy is classified as "high-risk" when health conditions or factors increase the chance of complications. High-risk pregnancies simply require extra monitoring or specialized care.
 

• Advanced Maternal Age: Being 35 years or older at delivery.

• Pre-Existing Health Conditions: Chronic hypertension, diabetes (Type 1 or 2), autoimmune disorders (e.g., lupus), thyroid disease, heart conditions, or kidney disease.

• Lifestyle Factors: Active smoking, alcohol use, substance exposure, or maternal obesity/underweight status.

• Multiple Gestation: Carrying twins, triplets, or higher-order multiples.

• Preeclampsia & Hypertensive Disorders: High blood pressure developing after 20 weeks with protein in the urine or organ strain.

• Gestational Diabetes: Blood sugar elevations developing during pregnancy.

• Placental or Cervical Issues: Placenta previa, placental abruption, or incompetent/shortened cervix.

• Fetal Conditions: Fetal growth restriction (FGR), congenital anomalies, or Rh factor incompatibility.

PREGNANCY WEIGHT GAIN RECOMMENDATIONS (BY PRE-PREGNANCY BMI)  

Underweight  (BMI < 18.5) = 28 to 40 lbs.               ~1.0 lb per week
Normal Weight (BMI 18.5 – 24.9) = 25 to 35 lbs.    ~1.0 lb per week
Overweight (BMI 25.0 – 29.9) = 15 to 25 lbs.          ~0.6 lbs per week
Obesity (I, II, III) (BMI ≥ 30) = 11 to 20 lbs.                ~0.5 lbs per week

*For single gestation/one baby

Vaccines During Pregnancy (Protecting Parent & Newborn)

1. Strongly Recommended Vaccines During Every Pregnancy
 

• Tdap (Tetanus, Diphtheria, Pertussis / Whooping Cough)

  • Timing: Administered between 27 and 36 weeks of gestation (preferably early in this window).

  • Purpose: Protects the newborn against pertussis (whooping cough), which can be severe or life-threatening in infants. Giving it in the third trimester maximizes antibody transfer to the fetus.

  • Note: A Tdap vaccine is recommended during every pregnancy, regardless of how recently you previously received one. Family members and infant caregivers should also receive a booster at least 2 weeks before meeting the baby.

• Flu (Influenza) Vaccine

  • Timing: Given as soon as available during flu season (typically September through April), during any trimester.

  • Purpose: Pregnant individuals are at high risk for severe flu complications, pneumonia, and premature labor. The vaccine protects the parent and provides infant protection for their first 6 months.

• RSV (Respiratory Syncytial Virus) Vaccine (Abrysvo)

  • Timing: Administered between 32 and 36 weeks of gestation during RSV season (typically September through January in most of the US).

  • Purpose: RSV is a leading cause of severe lower respiratory tract disease, bronchiolitis, and hospitalization in infants. Maternal vaccination allows antibodies to pass to the baby, protecting them for their first 6 months of life.

• COVID-19 Vaccine

  • Timing: Recommended during any trimester to stay up to date with current seasonal formulations.

  • Purpose: Reduces the risk of severe maternal COVID-19 illness, ICU admission, preeclampsia, and stillbirth, while providing infant antibodies after birth.

*No live vaccines (MMR, Varicella, nasal flu vaccine)

Essential Prenatal Care & Nutrition
 

• Folic Acid (400–800 mcg daily): Crucial to prevent neural tube defects (e.g., spina bifida). Start prior to conception or as early as possible.

• Iron: Supports increased maternal blood volume and prevents anemia.

• Calcium & Vitamin D: Supports fetal bone and teeth development.

• DHA / Omega-3s: Promotes fetal brain and eye development.

Standard Prenatal Diagnostic Tests
 

• Initial Blood Work: Checks blood type, Rh factor, hemoglobin/hematocrit (anemia), rubella/varicella immunity, and infectious disease screening (HIV, Hep B, Syphilis).

• Urine Checks: Performed at every visit for protein, glucose, and asymptomatic UTIs.

• Ultrasound Exams: Early dating scan (confirms due date) and 18–20 week Anatomy Scan (structural development).

• Milestone Screenings: Genetic screening (NIPT/quad screen), Glucose Challenge Test (24–28 weeks for gestational diabetes), and Group B Strep (GBS) swab (36–37 weeks)

Medications

Over-the-Counter Medications:

NSAIDs (ibupofen, naproxen, etc.) are generally NOT considered safe. However, low-dose aspirin is the exception for those who have either a single high-risk factor or two or more moderate-risk factors for preeclamspia. High-risk conditions include a history of preeclampsia, multifetal gestation (twins or higher), pre-existing chronic hypertension, Type 1 or Type 2 diabetes, chronic kidney disease, or autoimmune disorders. Moderate-risk factors include being a first-time mother (nulliparity), advanced maternal age (35 or older), a pre-pregnancy BMI over 30, a family history of preeclampsia in a mother or sister, an inter-pregnancy interval greater than 10 years, a history of a low birth weight infant, or specific sociodemographic risk factors like being Black or having a low socioeconomic status. When indicated, treatment should ideally begin at 12 weeks and continue daily until delivery to support healthy placental blood flow and reduce overall vascular strain. Acetaminophen is recommended as first-line treatment for pain and fever when used at the lowest effective dose for the shortest duration necessary. B6 (10–25 mg 3x daily) + Doxylamine (12.5–25 mg at bedtime) is the first-line ACOG-recommended combination for nausea and morning sickness. This condition typically peaks at week 8-10 and significantly improves by second trimester. 

Contraindicated Prescription Medications:

ACE or ARB antihypertensive medications (lisinopril, losartan, etc.), statins, warfarin, retinoids including Accutane, lithium, valproate/valproic acid (Depakote), carbamazepine (Tegretol), topiramate (Topamax), methotrexate.
 

Lifesyle Precautions
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• No alcohol of any amount during pregnancy

• No tobacco, vaping, or illegal street drugs

• Avoid cat litter boxes, & avoid gardening without gloves

• Avoid unpasteurized milk/cheeses (feta, brie, queso fresco unless labeled pasteurized), raw seafood/sushi, unpasteurized juices, and cold deli meats

• Avoid raw or undercooked eggs, meats, poultry, and unwashed raw produce.

• Ensure strong ventilation with cleaning products

• Avoid hot tub, saunas, and exercise in extreme heat

• Avoid high-mercury fish (shark, swordfish, king mackerel). Low-mercury options (canned light tuna, salmon, shrimp) are safe in moderation (2–3 servings/week).

• Limit total daily caffeine intake under 200 mg (about one 12 oz cup of coffee).

• Drink at least 8 glasses of water daily to stay hydrated
   

Postpartum Conception
 

• Ovulation Before Menstruation: Ovulation can occur as early as 3 to 4 weeks after giving birth. However, for those breastfeeding, pregnancy may be inhibited by up to 6 months postpartum depending on the extent of breastfeeding

• Interpregnancy Interval: ACOG guidelines recommend waiting at least 18 months between delivery and the next pregnancy (minimum 12 months) to prevent preterm birth, low birth weight, and maternal depletion.
   

Red Flag Symptoms (Seek Immediate Care)
 

• Vaginal Bleeding: Any bright red bleeding or severe spotting.

• Fluid Leakage: A sudden gush or continuous trickle of fluid from the vagina.

• Signs of Preeclampsia: Severe persistent headache, sudden face/hand swelling, vision changes (spots/flashing lights), or right upper abdominal pain.

• Decreased Fetal Movement: A noticeable drop or absence of normal movement in the third trimester.

• Signs of Preterm Labor: Regular, painful contractions or lower back pressure before 37 weeks.

• Infection Signs: High fever (over 100.4°F / 38°C), severe chills, or burning with urination.