Channel 4 viewers were in tears on Monday night as they tuned into the latest episode of Baby Surgeons: Delivering Miracles.
The new documentary series focuses on the extraordinary work of the fetal medicine, neonatal and maternity units at St George's Hospital and features staff and alumni from St George's, University of London.
The second episode followed various pregnant women as they navigated the heartbreaking decision as whether or not to undergo surgery whilst still expecting.
One woman named Susie was in tears as she was told her unborn triplets were at serious risk, but the surgery needed could result in her miscarrying.
© Channel 4Channel 4 viewers were in tears on Monday night as they tuned into the latest episode of Baby Surgeons: Delivering Miracles
"What we need to do is block anything that crosses the placenta," professor Basky Thilaganathan explained.
"We shine the light which tells us where the laser is aimed and the blood inside the vessel clots immediately."
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He was then filmed using a laser to seal off the blood vessels connecting Susie's twins.
Four hours later, he performed an ultrasound on Susie's stomach and confirmed that the baby's heartbeats were strong and the surgery had gone well.
© Channel 4Professor Basky Thilaganathan performed surgery on one woman who is expecting triplets
Viewers tuning in at home admitted it was an "emotional rollercoaster" watching the series and took to Twitter to comment.
"This programme is fascinating and amazing. The Surgeons are incredible. #BabySurgeons," one person wrote.
Another tweeted: "Genuinely think I held my breath throughout that surgery, heart in mouth! #BabySurgeons."
© Channel 4Pregnant mother Susie was in tears when she was told that surgery could result in her miscarrying her babies
A third person added: "What an emotional roller coaster #BabySurgeons #c4," while a fourth admitted: "Just casually crying every three minutes at #BabySurgeons."
A fifth viewer tweeted: "In absolute awe of the incredible families and Drs on #BabySurgeons!."
Baby Surgeons: Delivering Miracles airs Mondays at 9pm on Channel 4.