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。
脉象平和而虚弱的，是分娩后正常的脉象。医经中说：“阴脉搏动有力且与阳脉有明显区别，称为怀孕。”这是气血调和、阴阳交感的结果。诊察手少阴心经的脉动特别明显的，是怀孕的表现。
少阴，指的是心脉。心主血脉，另外肾被称为“胞门子户”（子宫），尺部候肾脉，尺部的脉象按之不绝，是妊娠的正常脉象。寸、关、尺三部脉象沉浮程度一致，按之不绝的，是怀孕。
妊娠初期，寸口脉微细，呼吸五次脉跳一次（即脉率较慢）。到了三个月，尺部脉数。脉象滑利疾速，重按之下脉形散开的，是胎儿已满三个月。脉象重按不散开，只是疾速而不滑利的，是五个月。
妇女妊娠四个月，想知道胎儿性别的法则：左手脉疾快的是男孩，右手脉疾快的是女孩，左右手都疾快的是双胞胎。
另一种方法：得到太阴脉的是男孩，得到太阳脉的是女孩。太阴脉沉，太阳脉浮。
又一种方法：左手脉沉实的是男孩，右手脉浮大的是女孩。左右手脉都沉实的，生两个男孩；左右手脉都浮大的，生两个女孩。
又一种方法：尺脉左边偏大的是男孩，右边偏大的是女孩，左右都大的是生双胞胎。所谓“大”，是指脉来充实有力的状态。
又一种方法：让孕妇面向南行走，然后回头呼唤她，向左回首的是男孩，向右回首的是女孩。
又一种方法：观察孕妇上厕所时，丈夫从后面急呼她，向左回首的是男孩，向右回首的是女孩。
又一种方法：孕妇怀孕时，如果她的丈夫左侧乳房有硬结，则怀的是男孩；右侧乳房有硬结，则怀的是女孩。
妇女怀孕临近分娩（离经），其脉象浮，如果伴有腹痛牵引腰脊，说明即将分娩。只要出现离经脉，即使没有病态也是临产征兆。
又一种方法：妇女将要分娩，其脉象离经，如果在半夜感觉到胎动或不适，到中午就会分娩。
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.