Nigeria (National) Round 4 Household and Female (HQFQ) survey used a three-stage sampling approach within a sample of seven states - Anambra, Kaduna, Kano, Lagos, Nasarawa, Rivers, Taraba. One state per zone was selected using probability proportional to size from among each of Nigeria’s six zones. The seventh state (Kaduna) was allocated to the northwest zone. A total of 302 clusters of enumeration areas (EAs) were drawn from the National Population Commission’s master sampling frame. In each cluster of EAs, households and private health facilities were listed and mapped; 35 households (40 in Lagos) were selected per cluster of EAs. Occupants in selected households were enumerated and eligible females of reproductive age (15-49) were contacted and consented for interview.  The final sample included 10,063 households  and 11,449 females. Data collection was conducted between April and May 2017 in all states.