
Who she is
Dra. Mª Elena Núñez Cerrato holds a degree in Medicine from the Universidad de Oviedo and trained in Obstetrics and Gynaecology at the Hospital Universitario de Burgos. In 2016 she completed the Master's in Human Reproduction at the Universidad Rey Juan Carlos.
She was a Research Fellow at the Fetal Medicine Foundation for three years (2016 to 2019) and obtained the Fetal Medicine Expert qualification at King's College Hospital in London, under the supervision of Prof. K. Nicolaides. She has worked at King's College Hospital, at the private clinic of the Fetal Medicine Centre in London and at the Hospital Universitario Virgen de la Arrixaca, in the Maternal-Fetal Medicine Unit, where she works now. She has published work in the journal Ultrasound in Obstetrics & Gynecology.
What fetal medicine is
It is the branch of obstetrics that looks at the baby's wellbeing during pregnancy: growth, anatomy and how the placenta is working. At the clinic it is done with 3D, 4D and Doppler maternal and fetal ultrasound, and complemented by screening for defects and complications.
Your pregnancy, week by week
12semanas
First weeks
This is the time for your first assessment and the first-trimester screening, to check that everything is progressing well.
The 20-week scan
The NHS explains that this scan is usually done between 18 and 21 weeks of pregnancy. It looks for signs of 11 conditions, including anencephaly, open spina bifida, cleft lip and palate, diaphragmatic hernia, serious cardiac abnormalities and Edwards' and Patau's syndromes, and it also checks the baby's growth, the placenta and the blood flow in the womb.
The NHS itself reminds us that the scan cannot find all conditions. If a problem is found, you may be offered further scans and tests and referred to a specialist who can explain them so you can decide. That is where fetal medicine makes the difference.
When to see a fetal medicine specialist
- If a routine scan has shown something you want to understand better.
- If you have a history that makes your pregnancy higher risk, or it already is.
- If you want a second opinion with a high-resolution scan.
- If you are planning a pregnancy and want to talk it through first.
Do you need fetal medicine?
The second-trimester ultrasound scan and specialist follow-up offer reassurance during pregnancy.
Are you pregnant or planning a pregnancy?
This questionnaire offers guidance, not a diagnosis. If the pain is severe or something worries you, book an appointment or seek urgent care.

About the specialist
Dra. Mª Elena Núñez Cerrato
Fetal Medicine expert trained at King's College Hospital in London, in the Maternal-Fetal Medicine Unit at La Arrixaca.
Frequently asked questions
Is a high-risk pregnancy the same as a pregnancy with problems?
No. It means it needs closer follow-up, and many end well. What matters is that a specialist does it.
Does the 20-week scan detect everything?
No. The NHS says it cannot find all conditions, which is why it is interpreted together with the rest of the follow-up.
Can I have 3D and 4D scans?
Yes. The clinic offers 3D, 4D and Doppler maternal and fetal ultrasound.
Sources consulted
- NHS: 20-week scan · Checked on October 30, 2026
This information is educational and does not replace a medical consultation. If you have symptoms, book an appointment with a specialist.
