There are a few different explanations for what the yellow liquid could mean in mother. One possibility is that it is colostrum, which is a form of milk produced by the mammary glands during pregnancy and early lactation. Colostrum is high in antibodies and can help protect newborns from infection. Another possibility is that the yellow liquid is vernix caseosa, a waxy substance that coats and protects the fetus during pregnancy. Vernix caseosa also helps to keep the baby's skin moisturized and prevents chafing. Finally, it is possible that the yellow liquid is amniotic fluid, which surrounds and cushions the fetus during pregnancy. Amniotic fluid also helps to regulate the temperature inside the womb and protect against infections.