
A breech birth is the birth of a baby from a breech presentation, in which the baby exits the pelvis with the buttocks or feet first as opposed to the normal head-first presentation. In breech presentation, fetal heart sounds are heard just above the umbilicus. The bottom-down position presents some hazards to the baby during the process of birth,...
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http://en.wikipedia.org/wiki/Breech_birth

Born feet first.
Found on
http://www.cat-world.com.au/glossary

Breech birth: Literally, delivery of the baby by the buttocks first, rather than the head as is usual. Breech birth is more likely to cause injury to the mother or the infant. In many cases a baby in the breech position can be 'turned' before delivery using repeated, gentle massage.
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http://www.medterms.com/script/main/art.asp?articlekey=2531

Hind end of the cat comes out first instead of the head.
Found on
http://www.pandecats.com/x/glossary.shtml

a birth in which the lamb is presented backwards with its rear legs tucked under and only its tail near the opening.
Found on
http://www.sheep101.info/201/glossary.html

childbirth in which the baby is turned around in the uterus and emerges head-last instead of head-first
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https://www.encyclo.co.uk/local/20875

A birth of a puppy whose hind end comes out first rather than the head.
Found on
https://www.encyclo.co.uk/local/21273

the positioning of the puppy when the feet come first down the birth canal, instead of head first. This position can occasionally present a problem with a puppy getting stuck.
Found on
https://www.encyclo.co.uk/local/22349

A birth in which the hind feet of the young are presented first.
Found on
https://www.encyclo.co.uk/local/22476

When the baby's buttocks, knees or feet appear first during delivery; usually results in a Cesarean section
Found on
https://www.encyclo.co.uk/local/22787

an abnormal delivery presentation in which the baby's feet, knees, or buttocks come into the birth canal first, before the baby's head.
Found on
https://www.stanfordchildrens.org/en/topic/default?id=glossary---pregnancy-
No exact match found.