rmc28: Rachel in hockey gear on the frozen fen at Upware, near Cambridge (Default)

[personal profile] rmc28 2007-08-08 11:11 am (UTC)(link)
Generally, once I'm fully awake, there's no chance of going back to sleep. So if I get woken up around 5am, I may as well do something fun with the time. It is no easier if I get woken at 10am, but if I have breakfast that late I risk migraines :(

I am becoming quite expert at waking up just enough to nurse the baby and/or go to the loo (that was more when pregnant and SOMEONE danced on my bladder) without triggering the "now I can't go back to sleep" reflex. Or I'm just too tired most of the time, and nursing has it's own built-in soporific. Changing a nappy is less easy to go back to sleep after unless I'm very tired.

[identity profile] ptc24.livejournal.com 2007-08-08 12:18 pm (UTC)(link)
nursing has it's own built-in soporific: Try feeding "oxytocin sleep" and "prolactin sleep" into PubMed - there seem to be some indications there of a link between prolactin (stimulates milk production) and oxytocin (stimulates milk release) and sleep. Then again, oxytocin gets up to all sorts of stuff and is regulated by all sorts of stuff, so whether this is an adaptation or a coincidence is not clear.

I was amused by an interesting paper title I found on one of those searches: "Oxytocin: an extremely potent inducer of penile erection and yawning in male rats."