脉平而虚者，乳子法也。经云∶阴搏阳别，谓之有子。此是血气和调，阳施阴化也。诊其手少阴脉动甚者，妊子也。
少阴，心脉也。心主血脉，又肾名胞门子户，尺中肾脉也，尺中之脉，按之不绝，法妊娠也。三部脉沉浮正等，按之无
绝者，有娠也。妊娠初时，寸微小，呼吸五至。三月而尺数也。脉滑疾，重以手按之散者，胎已三月也。脉重手按之不
散，但疾不滑者，五月也。
妇人妊娠四月，欲知男女法，左疾为男，右疾为女，俱疾为生二子。
又法∶得太阴脉为男，得太阳脉为女。太阴脉沉，太阳脉浮。
又法∶左手沉实为男，右手浮大为女。左右手俱沉实，猥生二男，左右手俱浮大，猥生二女。
又法∶尺脉左偏大为男，右偏大为女，左右俱大产二子。大者如实状。
又法∶左右尺俱浮，为产二男，不尔则女作男生。左右尺俱沉为产二女，不尔则男作女生也。
又法∶遣妊娠人面南行，还复呼之，左回首者是男，右回首者是女也。
又法∶看上圊时，夫从后急呼之，左回首是男，右回首是女也。
又法∶妇人妊娠，其夫左乳房有核是男，右乳房有核是女也。
妇人怀娠离经，其脉浮，设腹痛引腰脊，为今欲生也。但离经者，不病也。
又法∶妇人欲生，其脉离经，夜半觉，日中则生也。
A pulse that is level and deficient is the normal pattern after childbirth. The Classics state: "When the Yin pulse beats vigorously and is distinct from the Yang pulse, it indicates pregnancy." This signifies the harmonization of Qi and Blood, and the interaction of Yang and Yin. If the pulse of the Hand-Shaoyin (Heart Meridian) moves particularly strongly, it indicates pregnancy.
Shaoyin refers to the Heart pulse. The Heart governs the vessels and blood. Additionally, the Kidney is referred to as the "Gate of the Womb" (uterus), and the Chi position reflects the Kidney pulse. If the pulse at the Chi position does not cease upon pressure, it is a sign of pregnancy. If the pulses at the Cun, Guan, and Chi positions are equal in depth (floating or sinking) and do not cease upon pressure, it indicates pregnancy.
In early pregnancy, the Cun pulse is minute and small, with five breaths per pulse beat. At three months, the Chi pulse becomes rapid. A pulse that is slippery and rapid, which disperses when pressed heavily, indicates a fetus of three months. A pulse that does not disperse under heavy pressure but is rapid without being slippery, indicates five months.
For a pregnant woman at four months, the method to determine the sex of the fetus: a rapid pulse on the left indicates a male, a rapid pulse on the right indicates a female, and rapid pulses on both sides indicate twins.
Another method: Obtaining the Taiyin pulse indicates a male; obtaining the Taiyang pulse indicates a female. The Taiyin pulse is deep, while the Taiyang pulse is superficial.
Another method: A deep and solid pulse on the left hand indicates a male; a floating and large pulse on the right hand indicates a female. Deep and solid pulses on both hands indicate two males; floating and large pulses on both hands indicate two females.
Another method: A Chi pulse that is larger on the left indicates a male; larger on the right indicates a female; larger on both sides indicates twins. "Larger" refers to a full and robust pulse quality.
Another method: Have the pregnant woman face south and walk, then call her back. If she turns her head to the left, it is a male; if she turns her head to the right, it is a female.
Another method: Observe the woman when she goes to the toilet; if her husband calls her urgently from behind and she turns her head to the left, it is a male; if she turns her head to the right, it is a female.
Another method: If the husband of a pregnant woman has a nodule in his left breast, she carries a male; if he has a nodule in his right breast, she carries a female.
When a pregnant woman approaches labor (pulse deviates from the regular channel pattern), her pulse floats. If accompanied by abdominal pain radiating to the lower back and spine, delivery is imminent. The appearance of the "deviated pulse" alone, even without disease symptoms, indicates impending labor.
Another method: When a woman is about to give birth and her pulse deviates from the regular pattern, if she feels sensations at midnight, she will deliver by noon.