Tegans Hydro is caused by her spina bifida -her spinal cord isn't the same as yours or mine, it is 'broken' so to speak so the fluid doesn't drain properly that way (thats the normal route). She also has Chiari Malformation - so the hole at the base of her skull where the fluid actually drains through on the way to the spinal column is blocked too. The valve inbetween her ventricles in blocked due to damage that occurred when she 2 weeks old when she had a staph infection in her ventricles.
However, we are lucky because her Hydro isn't that bad. She went a week without a shunt before she started showing signs that she needed one, which is quite uncommon.
Her fluid got steadily worse, and at 38 weeks they said it was so bad that she wouldn't even breathe on her own, and I was scheduled to be induced at 39 weeks. They refused my request for a section, saying she would die when she was born anyway, so I might aswell have her vaginally so I could start TTC straight away

However, she was born, (via emergency section) at 40 weeks after a failed induction that lasted a week, and didn't need a shunt until she was a week old. So, obviously, the doctors were wrong. Her first shunt got infected because a small part of the wound on her back after her closure op got infected. She had another in 6 weeks later (had an EVD for six weeks) which is still in now, and is working great