Which statement accurately describes the timing of the deformity's development during pregnancy?

• A. It occurs late in pregnancy.
• B. It occurs in the first trimester, often before pregnancy recognition.
• C. It occurs during labor.
• D. It is due to postnatal injury.

Answer: (B)

This deformity forms very early in fetal life, during the first trimester. The lip and palate develop as facial processes fuse in early gestation—lip fusion occurs around weeks 4–7, and palate fusion around weeks 6–9. If fusion fails, a cleft lip or cleft palate results. Because these events happen before many women know they’re pregnant, the deformity is often present before pregnancy recognition. Development during labor or after birth, or due to postnatal injury, wouldn’t explain a congenital cleft.