23 Weeks Pregnant

Baby’s Development

Fetus ~28.9 cm (grapefruit), weight ~501 g [1]. Viability — with advanced NICU, ~25-30% survival at 23 weeks; ~50-70% at 24-25 weeks. Hearing fully functional — recognizes voices, music, loud noises (startle response). Lungs developing surfactant (substance that prevents alveoli from collapsing). Brain: rapid synapse formation. Skin wrinkled, translucent (still thin) — baby looks “elderly.” Lanugo covers body. Fingernails formed. Movement: active kicks, rolls, somersaults. Sleep-wake cycles: distinct, ~20-30 min. Viability age has arrived [2].

Pregnancy Symptoms

Energy still OK, may wane. Symptoms: backache, heartburn, constipation, leg cramps, mild swelling, headaches, Braxton Hicks. Uterus ~3-4 cm above navel. Kicks very distinct — partner can feel from outside. Round ligament pain, possible sciatica, pelvic pain (SPD). Possible swelling in feet/ankles. Heart rate 80-100 bpm. Viability is reached — anxiety may surface. Discuss with provider [2].

Body Changes

Uterus ~3-4 cm above navel. Weight gain: 15-22 lbs by week 23 typical. Bump clearly visible. Stretch marks, linea nigra, melasma, visible veins, varicose veins. Breasts 2 cup sizes up, colostrum may leak. Possible “pregnancy mask” (melasma) on face. Skin may be oilier, breakouts possible. Possible skin tags [2].

Tips for Week 23

• Address viability anxiety — normal to feel scared. Talk to OB about realistic outcomes, NICU tour (if helpful), what’s available. Knowledge reduces fear.
• NICU awareness — if you want to prepare, tour NICU at planned hospital. Premature birth is rare (10% of US births) but knowing the system helps.
• Strengthen + stabilize — focus on glutes, core (transverse abdominis), back. Pelvic tilts, glute bridges, side plank modifications, bird-dog. Reduces back pain, supports growing belly.
• Skin care update — keep using pregnancy-safe moisturizer. SPF 30+ daily (melasma protection). Vitamin C serum OK. Avoid hydroquinone, retinoids.

Things To Do (Checklist)

• Address viability anxiety: talk to OB, tour NICU if helpful
• Continue strength + core work (glutes, back, transverse abs)
• Update skincare: SPF 30+ daily, no retinoids
• Document “viability” milestone
• Schedule glucose screening (24-28 weeks)

Frequently Asked Questions

Q: What does “viability” mean? A: Gestational age at which a baby has reasonable chance of survival outside the womb (with advanced NICU). ~23-24 weeks. Survival rates: 23 wk ~25-30%, 24 wk ~50-70%, 25 wk ~70-80%, 26+ wk ~90%+ [1].

Q: I’m anxious about preterm birth. How common? A: ~10% of US births are preterm (< 37 wk). Most are late preterm (34-36 wk) with excellent outcomes. Signs: regular contractions, bleeding, fluid leaking, severe back pain [2].

Q: Can I do kick counts now? A: 23 weeks is early for formal kick counts. Most providers start at 28 weeks (10 movements in 2 hours). For now, just notice patterns [1].

For Dads

• Process viability as a couple — your partner may feel fear; you may too. Don’t minimize. Talk about it. Tour NICU if it helps. The “real” of prematurity is rare but real.
• Update the “go-bag” list — but don’t pack yet. Decide what you’re bringing, what your partner’s bringing, what baby needs. Make it a shared doc.
• Cook a “third trimester prep” meal — postpartum planning: freezer meals, easy snacks, hydration setup. Pre-batch 5-10 meals for after birth.
• Read The Expectant Father Ch. 20 — emotional reality of second-to-third trimester transition.
• Pray for lung development — surfactant production critical for first breath. Specific, weekly, intentional.

Sources

1. ACOG — How Your Fetus Grows During Pregnancy
2. Mayo Clinic — 23 Weeks Pregnant
3. What to Expect When You’re Expecting — Heidi Murkoff (Chapters 14-15: Second Trimester)