To understand plant evolution and diversification, information regarding chromosome number meiotic behavior is imperative. The present study was carried out to determine the count, behavior, pollen fertility, seed set of a medicinally important Peganum harmala. Two cytotypes, diploid tetraploid are growing in western Himalaya; cytotype (2n=2x=24) Kashmir Himalaya, (2n=4x=48) Trans Ladakh. Chrom...

Demographic transition is a set of changes in reproductive behavior that are experienced as a society is transformed from a traditional pre-industrial state to a highly developed, modernized structure. The transformation is the substitution of slow growth achieved with low fertility and mortality for slow growth maintained with relatively high fertility and mortality rates. Contrary to early ...

A qualitative study was conducted in Agincourt, a rural area of South Africa, to document the perceptions and attitudes towards premarital fertility and late marriage among young adults of both sexes. Two focus groups and 35 individual interviews were conducted among 17-30 year olds, randomly selected. Most interviewees perceived premarital fertility as undesirable, and a new phenomenon in a co...