Information for Clinicians


New guidelines for post pregnancy screening of hCG effective from 1st July 2017

Data analysis of more than 13,000 GTD patients in the UK shows that:
  • The detection rate for recurrent GTD on routine post-pregnancy screening of women previously diagnosed with one molar pregnancy is extremely low.
  • For women previously treated with GTN post pregnancy monitoring should still be continued.

The national gestational screening service has deemed it safe to no longer require hCG monitoring for women post pregnancy who have had one previous molar pregnancy that has not required chemotherapy.

Guidelines re oral contraceptives - Effective from 1st January 2014

  • Oestrogen and/ or progestogens taken between evacuation of the mole and the return to normality of hCG values appear not to increase the risk of invasive mole or choriocarcinoma developing.
  • Therefore women may use oral contraceptives after molar evacuation, before the hCG returns to normal.

Patient registration

Patient registration for tumour marker monitoring of hydatidiform moles is now available online. UK gynaecologists registering women with one of the specialist centres (Dundee, London or Sheffield) for this disease should use the NHSnet online form. This website provides a secure system complying with DH standards and the Data Protection Act 1998.

The address for registering patients is NHS net only (opens in a new window).

NB This site is external to the Sheffield Trophoblastic Disease Centre. If you have any problems please email If still having problems ring 0203 311 5555

If you are unable to register online you can fax the paper form to 0114 226 5511 or email this electronic version (Excel) to

Contact information for the other UK Centres

A guide to management practices at Weston Park Hospital

The booklet Gestational Trophoblastic Neoplasia: A guide to management at Weston Park Hospital provides a guide for all clinicians concerned with the management of patients with Gestational Trophoblastic Disease (GTD) at Weston Park Hospital (WPH), Sheffield Teaching Hospitals NHS Trust (STHFT).
This booklet was revised 20th January 2014.

International Society for the Study of Trophoblastic Diseases (ISSTD)

An online edition of the book Gestational Trophoblastic Disease (3rd edition) is available on the International Society for the Study of Trophoblastic Diseases (ISSTD) website.

European Organisation for Treatment of Trophoblastic Disease (EOTTD)

The EOTTD is a European network for clinicians/researchers working in the field of GTD

The Placental Site Trophoblastic Tumour Database

This is an international research project using an online database (opens in a new window) to gather data about this rare medical condition. The project relaunched in 2017 collecting data about Ultra High Risk Gestational Trophoblastic Neoplasia along with previously unreported PSTT cases. Registration is necessary.

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