Why our child's nickname is "Peanut"

While Christine was talking with her friend Lindsey this morning, the subject came up:  "Why do we call Peanut, Peanut?"  I had almost forgotten, so I thought I should write it down. 
The first time we saw Peanut was during our first ultrasound of the baby at 7 weeks.  If you have ever seen a baby at this age, it is really tiny.  The doctor pointed it out and said "there it is, just about the size of a peanut". We were amazed - so little yet moving and already a growing little person.  About this same time, Christine signed us up for babycenter.com and we were getting their bulletins where they related the baby's size to food items at each week, which cracked us up - apparently food items are good for people to relate to.  Here were their analogies:

• 5 weeks - sesame seed
• 6 weeks - small lentil bean
• 7 weeks - raspberry
• 8 weeks - kidney bean
• 9 weeks - grape
• 10 weeks - kumquat
• 13 weeks - jumbo shrimp
• 16 weeks - avocado
• 17 weeks - large onion
• 18 weeks - large sweet potato
• 19 weeks - small zucchini.

Back to the story - after the doctor's visit, Christine and I were in bed and I was listening at the belly to see if I could hear the 130 beat per minute heart rate.  She spontaneous started singing a silly song - as we are both wont to do.  She sang, "Peanut sat in my uterus, his heart was all aflutter.  Around the bend came the ultra-sound.  Click, click take a picture."  And ever since then the name has stuck.