Understanding Placenta Accreta Spectrum (PAS)

Expertise & Care by Dr Sri | Placenta Clinics at My Gynae Plus

Placenta Accreta Spectrum (PAS) is a serious pregnancy condition where the placenta attaches too deeply into the uterine wall. In some cases, it may invade surrounding organs such as the bladder. Early detection and specialist care are key to improving outcomes.

What is PAS?

PAS includes three types:
- Placenta accreta: placenta attaches too deeply to the uterus
- Placenta increta: placenta invades the uterine muscle
- Placenta percreta: placenta grows through the uterus and may reach other organs

Who is at Risk?

• Previous caesarean sections
• Placenta previa (low-lying placenta)
• Multiple uterine surgeries
• IVF or uterine abnormalities

Symptoms & Diagnosis

Most women do not have symptoms. PAS is usually detected during routine or targeted ultrasound scans. Specialist imaging, including colour Doppler and MRI, may be used for accurate diagnosis.

Dr Sri’s Expertise

Dr Sri is a recognised expert in abnormal placentation and during her MD with Prof Christoph Lees, established placenta clinics at Imperial College Healthcare NHS Trust. She has numerous publications in this field and offers private placenta scans at The Portland and at My Gynae Plus clinics.

To arrange an ultrasound and/or consultation for Placenta Accreta Spectrum, contact Dr Sri’s team at drdeeobgyn@gmail.com

Key Publications by Dr Sri on Placenta Accreta Spectrum

• Srinivasan D, et al. Expert opinion: Stepwise ultrasound assessment of suspected placenta accreta spectrum using 2D, Doppler and 3D imaging. *European Journal of Obstetrics and Gynaecology and Reproductive Biology*, Volume 270, 181–189.

• Srinivasan, D., Papanikolaou, K., Dall’Asta, A., and Lees, C. (2021). OC02.03: Description of the new ‘3V’ stepwise ultrasound-based diagnostic modality for abnormally invasive placenta. *Ultrasound Obstet Gynecol*, 58: 5-5. https://doi.org/10.1002/uog.23778

• A. Dall’Asta, Srinivasan D, C Lees (2022). White paper, Samsung Healthcare Global: Expert assessment of the fetal anatomy in Fetal Medicine: role of three-dimensional ultrasound, CrystalVue™ and MV-Flow™.

• Srinivasan D, A. Dall’Asta, C Lees (2022). White paper, Samsung Healthcare Global: Role of CrystalVue™ and MV-Flow™ with LumiFlow™ in the prenatal diagnosis of Placenta Accreta Spectrum.

She offers placenta scans at The Portland and at My Gynae Plus clinics.