In Season 8 they settle in being a married few. Although previous episodes imply Monica planned to immediately try for children after wedding,
Within their year that is first of they consider adjusting as newlyweds, supporting Ross and Rachel making use of their pregnancy and reassuring Joey about their new-found emotions for Rachel.
Into the Season 8 finale, Monica jokingly suggests they begin attempting for kids only for Chandler to seriously take her, admitting he is in love with them and thinks they're ready.