Milligan D, Drife J O, Short R V
Br Med J. 1975 Nov 29;4(5995):494-6. doi: 10.1136/bmj.4.5995.494.
The volume of the left and right breasts was measured daily in four nulliparous women during normal menstrual cycles and after the use of oral contraceptives. Breast volume increased significantly in the second half of both normal and contraceptive-controlled cycles. The mean total change in volume throughout the cycle was 100 ml under natural conditions and 66 ml on oral contraceptives.
在四个未生育女性的正常月经周期以及使用口服避孕药之后，每天测量其左右乳房的体积。在正常周期和口服避孕药控制的周期的后半期，乳房体积均显著增加。在自然状态下，整个周期的平均总体积变化为100毫升，使用口服避孕药时为66毫升。
