# PRN Graph

> PRN Graph (iPhone/iPad app by Glamorous Goat B.V..)

- Source: https://appshunter.io/ios/app/prn-graph/id843276615 (this page in markdown: same URL + `.md`)
- Developer: [Glamorous Goat B.V.](https://appshunter.io/developer/843276618)
- Category: Medical, Health & Fitness
- Price: Free
- Age rating: 17+
- Requires: iOS 16.0 · 6 MB
- Languages: American English, Dutch
- Released: 2014-03-28
- Data updated: 2026-05-16
- User reviews in markdown: https://appshunter.io/ios/app/prn-graph/id843276615/reviews.md

## What is PRN Graph?

The Perined-Hoftiezer birth weight curves show the optimal birth weight (and its distribution) of children born at the corresponding gestational age. The curves are differentiated by gender. Identifying small children is important for reducing mortality and morbidity.

These curves are based on data from the perinatal registration of newborns in the Netherlands. The curves are normative and therefore developed based on a low-risk population without known risk factors for fetal growth restriction. All multiple pregnancies, inductions, and primary cesarean sections were also excluded to approximate the optimal birth weight for each gestational age. More information can be found at www.perined.nl and in the following scientific publications:

Hoftiezer L et al. Am J Obstet Gynecol. (2019) From population reference to national standard: new and improved birthweight charts. 10.1016/j.ajog.2018.12.023

Hoftiezer L et al. Eur J Pediatr. (2016) Defining small-for-gestational-age: prescriptive versus descriptive birthweight standards. 10.1007/s00431-016-2740-8

The curves were compiled by Liset Hoftiezer, guided by a working group consisting of representatives from various professional groups, birth care organizations, and researchers:

Joyce Dijs-Elsinga, Jeroen van Dillen, Michel Hof, Marije Hogeveen, Chantal Hukkelhoven, Karline van de Kamp, Richard van Lingen, Alieke de Roon-Immerzeel, Rosalinde Snijders, Viki Verfaille, Ger de Winter, and Koos Zwinderman. The research position was financially supported by the Isala Innovation & Science Fund and Nutricia Early Life Nutrition; there has been no interference with the content of the project.

© 2024 Perined


## Version history (last 5 releases)

### 4.1 — 2025-03-18

Bugfixes

### 4.0 — 2025-02-18

- The app remembers the last information you entered (gender, birth weight, gestational age)
- The curve is showing the point with the p-value
- Highlight a row and column in the table for easy reading
- Improved accessibility

### 3.0.4 — 2023-08-15

Small bugfixes

### 3.0.3 — 2018-02-07

This app has been updated by Apple to display the Apple Watch app icon.

* Weight up to 5500 grams now possible to enter
* Small textual changes

### 3.0.2 — 2017-11-22

* Made some textual changes in the app
* And updated the App Store description to reflect the new version 3.0

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All apps by Glamorous Goat B.V.: https://appshunter.io/developer/843276618

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-16.*