This study aims to identify the effect of using Depot-medroxy progesterone acetate injectable contraceptives on lactating women mother and infant in 1st week versus 6th week postpartum initiation.

This study is open labeled -randomized clinical trial was used. It was conducted at woman's health hospital, Assuit University. This study applied on 120 lactating women, who divided into two equal group I (who used DMPA injectable in the 1st week postpartum) and group II (who used DMPA injectable in the 6th week postpartum). Each group included 60 lactating women). Follow up was carried out after 3 months from the first dose to determine the changes in the studied women's menstrual period, weight, breast feedings…etc.

Inclusion Criteria:

Desire contraception for at least one year Apparently healthy participant Age 20- 40 years old Term delivery Birth weight >2.5 kg multipara Intend to breastfeed at time of hospital discharge Those delivered normally or by caesarean section Ready to follow and need immediate contraception

Exclusion Criteria:

Maternal health problems (DM, HTN, cardiac disease, anaemia, or any other obvious problem) Any maternal complications during labour Preterm delivery IUGR