Baby Peach! We started calling baby that when he/she was the size of a peach and it stuck if it's a girl I have a feeling that will stay with her awhile.
When we found out we were expecting we bought coconut oil for my belly. My fiance would rub it on my belly while he talked to the baby and eventually he started calling me coconut tree and the baby coconut. I think it is such a cute nickname.
I call the baby bean or Beansie and my husband uses the name he wants to use. He thinks that if he keeps using it that it will become her name and he will get his way. Which is probably true.
We have called our baby the Sparkle since early on. Every now and then when my SO and I kiss there will be a static electricity spark, it's just the Sparkle saying hello. He even got me bracelets with the name on them. We (hopefully) find out gender tomorrow so we may shorten in to Spark for a boy.
My partner and I and both sides of our family use Nugget. Even my Co-workers call him/her that. It will probably stick with them through life. My sister was so excited when she decided when we find out gender we can call it nugget or nuggette. Haha.
Re: Temporary nick names??