Research goal: To examine the connection between mother's age and parity and to examine the way of finishing the pregnancy and parturition time (premature or term pregnancy) Materials and methods: In this retrospective cohort study I will be using data obtained by accessing and inspecting medical documentation - records of birth protocol and books for keeping statistics of the Clinic for Gynecology and Obstetrics of KBC Rijeka. First group will be made up of mothers who gave birth with medical assistance and the second group will made up of mothers who had a spontaneous pregnancy. The data that will be collected is: maternity history, data on current pregnancy, data on diseases in pregnancy, data on the birth weight of the child and the outcome of pregnancy. This study included 186 mothers who gave birth at the Clinic of Gynecology and Obstetrics in the KBC Rijeka from January 1, 2020 to December 31, 2020. Out of 186 mothers, 93 mothers gave birth with MPO and 93 mothers who gave birth with a spontaneous pregnancy. Results: In the examined groups, the MPO group will more often complete the pregnancy by caesarean section or surgery (p <0.001). Pregnant women from the MPO group gave birth prematurely (p <0.001). Pregnant women from the MPO group have a higher incidence rate of multiple pregnancies (p <0.001). Results show that out of 93 respondents from the group, 73 of them were first-born and that out of 73 of them, 38 were older than 35. Conclusions: Pregnancies from MPO are mostly elderly mothers and first-borns. Mothers who conceive with MPO are at higher risk of maternal, obstetric, and neonatal complications and require intensive antenatal and perinatal care. For further research, I recommend a wider range of years or taking a sample in which only primiparous women are in both groups or to filter the selection based on some other parameters.