Probably relevant:
https://en.m.wikipedia.org/wiki/Maternal_bond
"The maternal bond between a human female and her biological child usually begins to develop during pregnancy. The pregnant female adapts her lifestyle to suit the needs of the developing infant. At around 18 to 25 weeks into pregnancy, the mother begins to feel the fetus moving. Similar to seeing her child for the first time in an ultrasound scan, this experience usually leads the mother to feel more attached to her child.
Some believe that the developing fetus can hear the mother's heartbeat and voice and has the ability to respond to touch or movement. By the seventh month of pregnancy, two-thirds of women report a strong maternal bond with their unborn child.[2]
Mothers who did not want the pregnancy typically do not have a close relationship with the child. They are also more likely to suffer from post-partum depression or other mental health problems and less likely to breast-feed the infant.[3]
ChildbirthEdit
The process of childbirth is an experience that can contribute immensely to the mother and child bond. As every birth is unique, this may not always be the case. Factors such as experiencing a traumatic birth, the mother's childhood, medical stress, lack of support, and the influence of a spouse or partner can worsen rather than strengthen the bond.
The emotional bonding theory first appeared in the mid-1970s, and by the 1980s, bonding had become an accepted maternity term. Soon, the process became analyzed and scrutinized to the point of creating another term poor bonding.[citation needed][4]
Breastfeeding
Production of oxytocin during childbirth and lactation increases parasympathetic activity. Thus, anxiety is theoretically reduced. Generally, it is understood that maternal oxytocin circulation can predispose women to form bonds and show bonding behavior.[citation needed]
Breastfeeding is also strongly believed to foster the early post-partum maternal bond, via touch, response, and mutual gazing."