Charak Samhita
स्त्रीणामार्तवकाले तु प्रतिकर्म तदाचरेत्। गर्भासना सुखं स्नेहं तदाऽऽदत्ते ह्यपावृता॥६२॥
॥ Time of administration of uttara basti॥ In women, uttarabasti should be administered during the menses as the vagina is then open and easily receives the sneha administered,
english translation
strINAmArtavakAle tu pratikarma tadAcaret। garbhAsanA sukhaM snehaM tadA''datte hyapAvRtA॥62॥
hk transliteration by Sanscript