Human reproductive ecology to aid infant survival and growth. Lactational strategies vary cross-culturally, but can typically be defined by sibling sets and sex ratios, frequency of nursing, entire lactational duration, and milk composition. Milk is composed of my bioconstituents, but only a few will be outlined here. In the first days of puerperium, the first milk is thick and yellowish, also called colostrum. For weeks after that, mature milk is expressed and it has been shown that fetal-mammary gland signaling occurs even before birth in determining milk type and concentrations based on the fetus sex. Colostrum plays an important role in establishing the
Death Is Called Engelchen his comrades, his fights with Germans in Slovak mountains and his love, Marta, who acted as a spy for the resistance. He also remembers Engelchen, who is responsible for death of many Pavel's friends and for a massacre of 2 mountain villages. Marta comes to visit Pavel in the hospital to say goodbye. Her work as a spy made her look like a German collaborator to some and it earned her hate. After some time, Pavel recovers and leaves hospital to find Engelchen. Death Is Called Engelchen Death Is Called Engelchen () is a 1963 Czechoslovak war film directed by