Postmenstrual age (PMA)

Calculates the postmenstrual age from gestational age at birth and postnatal age – together with day of life, chronological age and corrected age.

Naegele FC; Loytved CAL, Fleming V (ZHAW): Lehrbuch der Geburtshülfe für Hebammen, 7. Auflage, Heidelberg: Mohr 1847, p. 89–90 – cited from Loytved CAL, Fleming V: Naegele's rule revisited (Sexual & Reproductive Healthcare 8:100–101, 2016) (2016); American College of Obstetricians and Gynecologists, American Institute of Ultrasound in Medicine, Society for Maternal–Fetal Medicine: Methods for Estimating the Due Date. Committee Opinion No. 700 (Obstet Gynecol 129:e150–e154) (2017); DGGG, OEGGG, SGGG: S2k guideline Induction of labor (AWMF register number 015-088), as of 12/2020 with addendum 04/2021, version 1.1 – section Indications for induction of labor, p. 29 (2021); DEGUM, ÖGUM, SGUMGG, DGGG, ÖGG et al.: S2e guideline First-trimester diagnosis and therapy @ 11–13+6 weeks of gestation (AWMF register number 085-002), as of 07/2025 – Recommendation 4.1 (dating by crown–rump length) (2025); American Academy of Pediatrics, Committee on Fetus and Newborn (Engle WA): Age Terminology During the Perinatal Period (Pediatrics 114:1362–1364) (2004); World Health Organization (WHO): Preterm birth – Fact sheet: definition of preterm birth and its subgroups (2023); American College of Obstetricians and Gynecologists: Definition of Term Pregnancy (Committee Opinion No. 579) (2013); Federal Ministry of Social Affairs, Health, Care and Consumer Protection: Austrian vaccination schedule 2025/2026 – vaccinations in preterm infants by chronological age (2025)