A research study to ascertain the perception towards decline in child sex ratio (DCSR) was carried out in Rewari district of Haryana state. Data was collected by interviewing 120 ANC (Antenatal care) clients using semi-structured interview schedule. The major findings of study are: (1) ANC beneficiaries are well aware of DCSR (Declining child sex ratio), but emphasized the need for more of BCC (Behavior change communication) activities by the Health Department. The factors mainly responsible for DCSR are: son preference and dowry. Mushrooming of USG (Ultrasonography) clinics is also expressed as a major factor by large number of respondents. (2) The various reasons for son preference are; that he is a supporter and provider for the parents in their old age; keeps the family name alive and are needed to perform their last rites. Also, by investing on sons’ education or business, the wealth remains in the family. (3) The major reasons for not preferring female child are dowry and perception of girls being paraya dhan. Other perceptions are that investing on girls is a waste with no returns and security reasons especially against sexual offences. (4) Majority of them perceived non-availability of brides as major repercussion of DCSR followed by increased crime against women and polyandry.