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Availability, usage and preferences of estradiol, and progestogen preparations for puberty induction from multicentral perspective.

INTRODUCTION: Natural oestrogen administration as oral or transdermal 17β-estradiol is recommended for pubertal induction in girls with hypogonadism. However, suitable low-dose formulations are not consistently available globally. This questionnaire study aimed to identify the current availability of estrogen and progesterone preparations worldwide.

METHODS: Endorsed by the ESPE Turner Syndrome Working Group, the questionnaire targeted pediatric endocrinologists. Questions focused on accessibility of oral/transdermal 17β-estradiol and progestogen preparations. Responses were collected through a SurveyMonkey survey disseminated via ESPE channels, direct outreach, and conferences from June 2020 to December 2022.

RESULTS: Participation included 229 healthcare professionals from 45 countries. Oral and transdermal 17β-estradiol in adult dosage were highly accessible (86.5% and 84.3%), with transdermal administration the preferred form (62.8%). Most commonly available estradiol preparations included 50 µg patches (32 countries) and 1 or 2 mg tablets (65.8% and 71.1% countries). However, 0.5 mg 17β-estradiol tablets were available in only 20% of respondents from 8 countries. Patches delivering 14 or 25 mcg/day of 17β-estradiol were available in 3 and 20 countries, respectively. Oral progestogen had widespread availability (96.0%) and preference (87.0%), while transdermal usage was limited to 15.2% of respondents.

CONCLUSION: This study highlights global challenges in accessing suitable hormone preparations for female pubertal induction. In most countries the lowest dose of the estradiol is 50µg for patches and 2 mg for tablets. Appropriate low dose 17β-estradiol tablets are much less available than low-dose patches. Our survey underscores the importance of adapting guidelines to local availability, and the need for improved accessibility to address these global disparities.

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