Given the wide range of environmental conditions humans now live, some reproductive anomalies began to emerge. The increase of the average life expectancy of 250 years also came with an extension of the childbearing years. Typically 14 to 80 years of age for women. However now increases in gestation were also being noted. Sometimes by as much as three to six months, particularly on planets and colonies with lower gravity. As well the occurrence of twins and plural fertilization had become extremely rare.