بریدهء جراید علمی

"There are, however, some costs associated with choosing such a partner for long-term relationship. Male height (e.g. Heald et al., 2003) and strength (Roy et al., 2002) are related to higher levels of testosterone (T), and high levels of T are associated with elevated reactive aggression (Benderlioglu et al., 2004). Since masculinity increases perceived dominance and aggressiveness (Perrett et al., 1998) it may negatively affect paternal investment. This is why one should expect that in less fertile phase of menstrual cycle or when choosing a long-term partner women might prefer men with less masculine features (Burnham et al., 2003, Gray et al., 2002 and Perrett et al., 1998)."