Pregnancy and lactation are reproductive phases that require large amounts of energy. Females in the period need good quality quantity food to provide nutrition for fetus, milk production child care. The mother will adapt changes behavior patterns type meet these needs. influence parity environmental conditions can affect females. During pregnancy, Macaca nigra is known have different proportio...

The co-evolution of adolescents' friendship networks and their smoking behavior is examined in a large sample across six European countries. Selection and influence processes are disentangled using new methods of social network analysis that enable alternative selection mechanisms to be controlled for. The sample consisted of 7704 adolescents participating in the control group of the ESFA (Euro...