The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Previous studies with postmenopausal women receiving oral doses of norethisterone-containing preparations have shown that a small fraction of the dose is converted metabolically to ethinyl estradiol and may be detected in the peripheral blood. To investigate the extent and the dose dependence of this conversion in more detail, we performed a study with 24 postmenopausal women who received single...
The absence of an effect of high oral doses of vitamin C on the systemic availability of ethinylestradiol in women using a levonorgestrel-containing combination oral contraceptive (0.15 mg levonorgestrel and 0.03 mg ethinylestradiol) was demonstrated in a recent study. However, it is conceivable that the oral administration of gram quantities of vitamin C could also interfere with the sulfation of...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.