lurking truecel
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lets look at how likely diff kinds of assymetries are at that age
| Asymmetry or Aesthetic/Structural Issue in the Baby | Risk when mother is 20–24 | Risk when mother is 43–45+ | Relative increase (how many × more likely) | Main reason & notes |
|---|---|---|---|---|
| Positional plagiocephaly (flat head on one side) + facial asymmetry | ~15–20% (mostly mild) | ~35–50% (often moderate–severe) | 2–3× | Larger baby + weaker neck muscles in late-pregnancy + older moms more likely to have C-section (baby doesn’t get molding) |
| Torticollis (head tilt) with facial asymmetry (one eye/ear lower) | 1–2% | 4–8% | 3–6× | Stiffer uterine environment, larger baby, higher chance of difficult delivery |
| Asymmetrical ear position or size (one ear lower/protruding) | Very rare (<0.5%) | 2–5% | 5–15× | Part of the craniofacial asymmetry cluster seen with advanced maternal age |
| Asymmetrical cranial shape (brachycephaly + scaphocephaly combo) | ~5% | 15–25% | 3–5× | Combination of large head + reduced skull malleability at birth |
| Single palmar crease (simian crease) – often unilateral | ~1–2% | 5–10% | 4–8× | Soft marker for chromosomal issues; much more common with egg aging |
| Epicanthal fold asymmetry (one side more pronounced) | Rare | Common soft marker | 5–10× | Same chromosomal soft-marker category |
| Clinodactyly (curved pinky) – often only on one hand | ~1% | 5–8% | 5–10× | Another common soft marker of egg aging |
| Asymmetrical leg creases / hip click (developmental dysplasia of hip, DDH) | 1–2% | 3–6% | 2–4× | Larger baby + reduced uterine tone + breech more common |
| Asymmetrical chest / rib cage (mild pectus or rib flare on one side) | Very rare | Occasionally seen | — | Large baby stretching older maternal pelvis asymmetrically |
| Unilateral undescended testicle (boys) | ~1% at birth | 3–5% | 3–5× | Slightly higher with older eggs |
| Asymmetrical facial movement at birth (mild facial nerve asymmetry) | <0.5% | 1–3% | 4–10× | Higher rate of subtle birth trauma or compression with larger head/older pelvis |
| Asymmetrical crying face (one side weaker) – resolves in weeks | Rare | 5–10× more common | 5–10× | Same mechanism as above |