ISUOG  (The International Society of Ultrasound in Obstetrics and Gynecology): https://www.isuog.org/resource/practice-guidelines-role-of-ultrasound-in-screening-for-pe-pdf.html

 “A combination of maternal factors, maternal arterial blood pressure, uterine artery Doppler and PlGF level at 11–13 weeks appears to be the most efficient screening model for identification of women at risk of PE (GRADE OF RECOMMENDATION: B).”

FIGO  (The International Federation of Gynecology and Obstetrics): 

https://www.figo.org/figo-releases-new-guidelines-combat-pre-eclampsia

 “FIGO adopts and supports the Fetal Medicine foundation position that all pregnant women should be screened for preterm preeclampsia by the first trimester combined test with maternal risk factors, mean arterial pressure, uterine artery pulsatility index and placental growth factor as a one-step procedure"

ISSHP (International Society for the Study of Hypertension in Pregnancy): https://isshp.org/guidelines/

If testing is available, after appropriate counselling, women should be screened at 11–14 weeks for preterm pre-eclampsia risk, using a combination of clinical risk factors, BP, uterine artery pulsatility index, and PlGF, as available, even if they have been already been identified as having clinical ‘high-risk’ factors (⊕⊕⊕O/Strong).

NICE( National Institute for Health and Care Excellence):

https://www.nice.org.uk/guidance/ng133

Offer placental growth factor (PlGF)-based testing to help rule out preeclampsia in women presenting with suspected pre-eclampsia (for example, with gestational hypertension) between 20 weeks and up to 35 weeks of pregnancy