Breastfeeding social reactions in the English-speaking world. It is possible for a mother to continue breastfeeding an older sibling while also breastfeeding a new baby; this is called "tandem nursing". During the late stages of pregnancy, the milk changes to colostrum. While some children continue to breastfeed even with this change, others may wean. Most mothers can produce enough milk for tandem nursing, but the new baby should be nursed first for at least the first few days after delivery to ensure that it receives enough colostrum. Breastfeeding triplets or larger broods is a challenge given babies' varying appetites. Breasts can
Modular form The situation with modular forms is precisely analogous. Modular forms can also be profitably approached from this geometric direction, as sections of line bundles on the moduli space of elliptic curves. If "f" is holomorphic at the cusp (has no pole at "q" = 0), it is called an entire modular form. If "f" is meromorphic but not holomorphic at the cusp, it is called a non-entire modular form. For example, the j-invariant is a non-entire modular form of weight 0, and has a simple pole at i∞. Other common generalizations allow the weight "k" to not be an integer,