1. Kesehatan Reproduksi;Widyastuti,2009
2. Voices heard: Latino adults and teens speak up about teen pregnancy;Vexler,2017
3. Preconception care Report of a regional expert group consultation;WHO,2013
4. The history of preconception care: evolving guidelines and standards;Moos;Matern Child Health J,2006
5. Perceptions of preconception counselling among women planning a pregnancy: a qualitative study [Internet series];Zee,2012