Gestational age at birth is a critical factor for perinatal and adulthood outcomes, and even for transgenerational conditions’ effects. Preterm birth (PTB) (prematurity) is still the main determinant for infant mortality and morbidity leading cause of infant morbidity and mortality. Unfortunately, preterm birth (PTB) is a relevant public health issue worldwide and the global PTB rate is around 11%. The premature activation of labor is underlined by complex mechanisms, with a multifactorial origin influenced by numerous known and probably unknown triggers. The possible mechanisms involved in a too early labor activation have been partially explained, and involve chemokines, receptors, and imbalanced inflammatory paths. Strategies for the early detection and prevention of this obstetric condition were proposed in clinical settings with interesting results. Progesterone has been demonstrated to have a key role in PTB prevention, showing several positive effects, such as lower prostaglandin synthesis, the inhibition of cervical stromal degradation, modulating the inflammatory response, reducing gap junction formation, and decreasing myometrial activation. The available scientific knowledge, data and recommendations address multiple current areas of debate regarding the use of progesterone in multifetal gestation, including different formulations, doses and routes of administration and its safety profile in pregnancy.
Pregnant women seem at higher risk than non-pregnant women for pandemic and seasonal influenza-related morbidity and mortality 1-3 due to a physiologic impairment of cell-mediated immunity in pregnancy. 4 In addition to maternal risks, influenza infection during pregnancy can pose risks to offspring. 5,6 As a result of this increased risk in pregnancy, seasonal influenza vaccination is recommended in several countries for all pregnant women, 7,8 and the World Health Organization (WHO) has included
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