Placenta 12 hours later?

If she had a sluggish delivery..placenta can take time too. If it's dragging..tie it up in a knot. This will also add some pressure and help delivery. Don't pull on it at all. Is baby nursing well..that helps as well.

Sorry you lost the two.

Also keep a eye on temp. The biggest concern with a retained placenta is infection. Some people with cattle and horses will flush the uterus if still retained after 24 hours. I’ve have only 2 goats that kept it that long and I did distilled water and a uterine bolus. I don’t think it really made the placenta come out faster but they never got infected and were able to conceive the following year.
Try keeping her in a nice clean spot as well.

Definitely doing a uterine flush at least after it's delivered can give her a good clean. I use 50/50 sterile warm water and white vinegar. I add 10 drops quality lavender essential oil and tea tree essential oil each.

I would give her Selenium gel with Vit. That will help her. Usually selenium deficiency causes that. Good job on watching her!

Calcium deficiency can also cause retained placenta. I use Oral CalMPK to address that.

All great suggestions.