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1690 R. Brown tr. Plutarch Of Nat. Affections in tr. Plutarch Morals IV. 224 In Women, what Blood abounds more than serves for necessary Uses..is by Nature in monthly Periods discharged by proper Canals and Passages, for the Relief and Purgation of the Body.

1694 W. Salmon tr. Y. van Diemerbroeck Anat. Human Bodies (new ed.) ii. 34 She told me..that it was a good while before her Monthly Period would be up.

1762 W. Smellie Treat. Midwifery (ed. 4) I. 109 If the flux be so frequent or immoderate as to exhaust the strength of the patient, it will be necessary to prescribe bleeding before the return of period.

1766 L. Carter Diary 24 July (1965) I. 320 My daughter..went to the great race, when it seems it was a most improper time being her Lunar period... She danced though sick for her period coming on.

1806 Med. & Physical Jrnl. 15 29 About five years ago the monthly period ceased, and since that time the head-ach became universal.

1826 Lancet 3 June 292/1 May not a woman who has missed her month conceive at any interval before the next period?

1891 I. Ellis Essent. Conception 28 (advt.) Ladies' ‘period’ towels.

1922 J. Joyce Ulysses ii. xiii. [Nausicaa] 358 Some women for instance warn you off when they have their period.

1956 R. M. Lester Towards Hereafter x. 123 I missed a period and with high hopes I went to see my G.P. and told him the glad news.

2000 Observer 18 June 2/5 The age of the first period had fallen below 13 in Britain for the first time.