Knowledge and attitudes of adolescent girls and their mothers about early pregnancy: a cross-sectional study

BACKGROUND: Adolescent pregnancy is an important public health problem and a socio-economic challenge in diverse societies. As a tremendously important problem, this issue has caused major concerns, as it exposes adolescent girls to social isolation and physical and psychological harm. So, this study aimed to determine the knowledge and attitude of adolescent girls and their mothers about early pregnancy, its causes, consequences, and predictors in Tabriz-Iran in 2020–21. METHODS: This cross-sectional study was done with 540 people (270 adolescent girls and 270 mothers) in the health centers of Tabriz. Data were collected using the questionnaires of sociodemographic information, knowledge, and adolescent girls’ attitudes and their mothers about early pregnancy, its causes, and consequences. Multivariate logistic regression was used to determine the predictors of adolescent girls and their mothers’ attitudes toward early pregnancy. RESULTS: The mean (SD: Standard Deviation) of knowledge of adolescent girls and their mothers about early pregnancy was 5.17 (3.11) and 5.57 (3.01), respectively (score range: 0 to 9). Most girls (94.1%) and mothers (87.1%) opposed pregnancy before 18. There was a statistically significant relationship between the knowledge and attitudes of girls (p < 0.001) and mothers (p < 0.001) about pregnancy at a young age. Adolescent girls and their mothers mentioned the lack of sufficient knowledge about sexual relations (57.4% of girls and 66.3% mothers agree) and the lack of knowledge about contraceptive methods (51.9% girl and 59.2% mother agree) important reasons for early pregnancy. Based on the multivariate logistic regression model and controlling for potentially confounding variables, girls whose parents were married under the age of 18 were about three times more likely to agree to early pregnancy than girls whose parents married over the age of 18 (OR = 3.10; 95% Cl: 0.90 to 10.69; p = 0.037). Also, mothers whose other children were married before 18 were almost five times more likely to agree to early pregnancy than women whose other children were not married before 18 (OR = 4.91; 95% Cl: 1.60 to 15.10; p = 0.045). CONCLUSIONS: The current study results indicate that despite the negative attitude of adolescent girls and their mothers towards early pregnancy, they had a low level of knowledge about early pregnancy. Consequently, increasing the level of knowledge of girls and their families about the consequences of marriage and pregnancy at an early age and creating a culture to correct cultural and social misconceptions to prevent marriage and pregnancy of children can reduce the severity of this damage. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12884-022-04551-z.