Materials and Methods: This cross-sectional study was conducted on married Iranian men and women through an online survey. A questionnaire consisting of demographic characteristics, including age of subject, age of spouse, duration of marriage, number of children, education level of subjects and his/her spouse, current pregnancy status of subject or spouse, contraception use and type of contraception, and a validated questionnaire to identify the factors affecting willingness to have child in 4 domains (inter family factors, social factors, medical and parental factors and emotional and child related factors) were filled by subjects.

Results: A total of 731 subjects (23.1% male and 66.9% female) answered the online questions. Mean age of subjects was 31.80 ± 6.83 years. Willingness to have child was significantly related to spousal age difference (P = 0.002, odds ratio [OR] =0.90), number of children (P < 0.001, OR=0.21), being pregnant (P < 0.001, OR=82.91), level of education in spouse (P = 0.03, OR=2.18), inter family factors score (P < 0.001, OR=1.14), social factors score (P < 0.001, OR=0.87) and emotional and child related factors (P < 0.001, OR=1.52).

Conclusions: This study revealed that willingness to have child in Iranian men and women is mostly influenced by personal and spousal factors.