Objective: To investigate the regularities and characters of the ventrimeson pigmentation phenomenon in pregnant women and puberal college students so as to explore the correlation between the ventrimeson pigmentation and the Conception Vessel(CV).Methods: The investigation was conducted in 68 predelivery women including 64 primiparae and 4 pluriparae ranging in age from 21 to 39 years(mean 28.03±3.62 years) and 148 puberal college students including 99 males and 49 females ranging in age from 17 to 24 years(mean 21.24±1.19 years).In these volunteer subjects

the pigmentation trace was photographed and recorded by a 3 people-composed group of the present paper.Results: The ventrimeson pigmentation appeared in all the 68(100%) predelivery women being dark-brown in color

starting from clitoris and ascending along the running course of the CV

ranging in length from(27 cm)(reaching the inferior part of the xiphoid) to(45 cm)(over the xiphoid

mean 34.91±(3.58 cm)) and ranging in width from (3-16 mm)(mean 8.07±(2.57 mm));while in 148 college students

the pigmentation band appeared in 41(83.67%) girls and 7(7.07%) boys

starting from the clitoris or the root of penis to ascend along the ventrimeson and ending below the umbilicus in most girls and in the 7 boys

ranging in length from the upper border of the pubic symphysis(artificial measure point) to the ending point being 13-(28 cm)(mean 15.04±(2.40 cm)) in 41 girls and 12-(36 cm)(mean 19.14±(6.94 cm)) in 7 boys

ranging in width from(2-13 mm)(3.01±(0.58 mm)) in these girls and from 2-(3 mm)(2.75±(0.50 mm)) in these boys.The appearance rate

average length and width of the pigmentation band of pregnant women were significantly bigger than those of puberal college students(P<0.01)

and the color of the pigmentation in pregnant was also apparently heavier.Conclusion: The ventrimeson pigmentation

coincident to the running course of CV

is one of the visible meridian phenomena

which is important to learn the essence of meridian by making clear of its regularities

characters and mechanisms.