8 Weeks Pregnant

Baby’s Development

End of embryonic period — now officially a fetus. Length ~1.6-2.0 cm (raspberry), weight ~1 g [1]. Fingers and toes are distinct (webbing gone), tail has disappeared, trunk elongates. The face is recognizably human: nose, upper lip forming, eyelids fused shut, ears low-set, retina pigmented. The brain connects to facial muscles — first facial expressions possible. Lungs branch extensively (bronchial tree). Kidneys produce urine (fetal urine becomes amniotic fluid by ~week 12). External genitals begin differentiating (still ambiguous on ultrasound until 12-14). Touch receptors around mouth (lips, nose) — earliest sensory development. Spontaneous movements begin (mother can’t feel yet) [2].

Pregnancy Symptoms

hCG near peak. Nausea often worst this week. Fatigue profound. Frequent urination. Breast heaviness/soreness. Heartburn. Bloating. Headaches. Mood swings. Food aversions. Spotting possible. Slight weight gain or loss normal. Some get lightheadedness (low blood pressure from increased blood volume + vasodilation) [2].

Body Changes

Uterus ~size of a lime, can be felt abdominally just above pubic bone on thin people. Bra size +0.5-1 cup. Waistline thickening. Visible veins on breasts, legs. Possible nasal congestion (rhinitis of pregnancy — estrogen increases blood flow to mucous membranes). Gums may bleed (pregnancy gingivitis). Skin changes: “pregnancy glow” (increased oil + blood flow) or acne [2].

Tips for Week 8

• First prenatal visit typically now — comprehensive intake: full history, exam, blood work (CBC, blood type/Rh, antibody screen, Rubella, Hep B, HIV, syphilis, possibly varicella, thyroid, vitamin D, urine culture) [1].
• Discuss genetic screening options: NIPT (10+ weeks), NT scan (11-14 weeks), carrier screening (if not done). NIPT checks T21, T18, T13 + sex chromosomes via maternal blood [3].
• Lifestyle audit: review every product (skin/hair/cleaning) for retinoids, salicylic acid >2%, hydroquinone, formaldehyde, BPA. Switch to pregnancy-safe.
• Address the half marathon — week ~10-11. Clear with OB: most runners can do 13.1 with pacing, hydration, cool weather, no PR attempts.

Things To Do (Checklist)

• Attend first full prenatal visit (1-2 hrs typical)
• Complete intake blood work
• Discuss genetic screening (NIPT) timing
• Swap retinoids/salicylic acid for azelaic acid/glycolic
• Confirm half marathon plan with OB

Frequently Asked Questions

Q: I’m not showing — is baby OK? A: Completely normal. First pregnancy: visible bump ~14-20 weeks. Body shape, muscle tone, position all affect visibility. Growth measured at next ultrasound, not appearance [2].

Q: Is spotting normal after sex? A: Yes, 1-2 days of pink/brown spotting is common (cervical friability from increased blood flow). Painful + heavy + red = call provider [1].

Q: When is the right time to announce? A: Medically: 24-72 hrs after first ultrasound (viability confirmed). Socially: whenever feels right. The “12-week rule” is cultural, not medical [3].

For Dads

• Attend the first prenatal visit — meet the OB/midwife, hear the heartbeat, see ultrasound screen, ask questions. Take notes or record (with permission).
• Set up shared calendar — appointments, ultrasounds, deadline for genetic decisions (NIPT), work travel blocks. “Who has it” is the question to end.
• Start a baby expense spreadsheet — research actual your area/your area costs: hospital, OB, lactation consultant, postpartum care, gear. Numbers ground you both.
• Read Expecting Better Ch. 5-6 (Oster) — genetic testing, what the data actually says, helps with NIPT decision.
• Pray for the fetal transition this week — embryonic → fetal; “formed in the image of God” frame.

Sources

1. ACOG — How Your Fetus Grows During Pregnancy
2. Mayo Clinic — 8 Weeks Pregnant
3. Expecting Better — Emily Oster (Chapters 5-6: Genetic Testing & First Trimester Decisions)