What is the primary action of Atosiban in pregnancy?

Atosiban primarily acts by blocking oxytocin receptors, which plays a crucial role in its therapeutic effect during pregnancy. Oxytocin is a hormone that promotes uterine contractions, and by inhibiting its action, Atosiban helps to delay preterm labor. This means that the drug is effective in its ability to reduce or stop contractions that could lead to premature delivery, thus allowing for more time for fetal development.

The significance of this mechanism lies in its targeted approach to manage preterm labor without significant stimulation of the uterus, which is essential for maintaining a pregnancy longer. This selective blocking of oxytocin receptors helps to ensure the safety of both the mother and the fetus, as it effectively addresses the primary physiological trigger of labor contractions.