The invention relates to a novel method of administering the natural female sex hormones, 17 .beta.-estradiol and progesterone, to achieve enhanced bioavailability thereof. The invention further relates to novel dosage forms of 17 .beta.-estradiol and/or progesterone which are adapted for nasal administration,...http://www.google.com/patents/US4383993?utm_source=gb-gplus-sharePatent US4383993 - Nasal dosage forms containing natural female sex hormones
