To compare two intrauterine systems in order to avoid complications originating from short pregnancy interval and undesired pregnancies in the early postpartum period.

The patients admitting to Zeynep Kamil Research and Training Hospital for caesarean delivery will be included in the study. There will be two computer based randomized groups. The investigators expect that both groups will have 100 cases. First group will be treated with conventional intrauterine devices (Cu T380 A) while the second group will be treated with frameless intrauterine devices (GyneFix). The participants will be informed about postpartum unplanned pregnancies and the complications of short pregnancy interval. Participants will also be informed about possible complications of having an intrauterine device and that there may be a possibility of failure.The participants who choose to participate in the study will be divided into two groups by computer based randomization and one of the systems will be applied. After the participants read and sign the informed consent form, the intrauterine device will be applied postplacental up to 10 minutes.

Inclusion Criteria:

• The patients who read and sign the informed consent form.

Exclusion Criteria:

• The patient who has more than 6 cm dilatation, prolonged premature rupture of the membranes (more than 12 hours), chorioamnionitis, and kongenital or acquired haemorragic diathesis will be excluded from the study.