A birth tie is a thick tie seen at birth connecting both parent and offspring. It generally lasts for 100 cycles. A number of cycles are spent transferring epigenetic or "racial memory" from parent to child.
Bots can reduce the time spent in the birth tie by firing ties at the parent or child manually and deleting them, since only one tie can be formed between any two bots, and newer ties always supplant older ones. Ordinarily this is done to reduce motion penalties imposed by attached bot.
Most parents and children coupled together with a birth tie are vulnerable to outside attack. Also, they tend to attempt moving in different directions, with the result that they go nowhere.
Other methods to compensate for this problem:
- limit motion when tied to child
- limit child's motion (either parent does this manually, or its coded into newborn babies)