Conclusions: The results of this study demonstrate that topical 2% progesterone acts primarily in increasing elasticity and firmness in the skin of peri- and postmenopausal women. These effects in combination with good tolerability make progesterone a possible treatment agent for slowing down the ageing process of female skin after onset of the menopause.Full article can be accessed here. Progesterone levels in pregnant women will rise to approximately 400 mg/day during the third trimester. As progesterone is bathing a woman’s womb, it is also promoting skin elasticity of the belly, which protects the skin from damage.