Tips

• Enter the bare minimum:
  • Can enter just sex, gestational age, and growth metrics, without dates, if desired
  • If only a gestational age is entered, the 50th percentile values will be displayed
  • If any dates are entered, the other dates and ages are calculated where possible
• Gestational age and dates can be calculated under Dates: LMP, due date, birth, day of life.
• Gestational age: weeks and days, e.g. 30 3/7 (30+3 also works)
• Weight: grams. To enter pounds and ounces, enter e.g. 8-4 for 8 lb 4 oz
• Head circumference and length: cm. For inches, enter e.g. 20"

Based on

• Fenton TR et al. Paediatr Perinat Epidemiol 2025;39:543-555
• Shukla H, Ferrara A. Am J Dis Child 1986;140:786-8
• Fierson WM, AAP Section on Ophthalmology. Pediatrics 2018;142:e20183061

Sources and methods · How to cite