《素问》曰∶妇人足少阴脉动甚者，妊子也。又曰∶阴搏阳别，谓之有子。
王太仆曰∶足少阴，肾脉也。动者，如豆厥厥动摇也。阴，尺中也。搏，谓搏触于手也。尺脉搏击，与寸
脉殊别，则有孕之兆也。
《难经》曰∶女子以肾系胞，三部浮沉正等，按之不绝者，有妊也。
王叔和曰∶妇人三部脉浮沉，以手按之不绝者，孕子也。妊娠初时，寸微，呼吸五至而尺数也。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。此即阴搏阳别之义。言尺脉滑数，寸
脉微小，而尺与寸脉别者，孕脉也。
齐仲甫曰∶经云，阴搏阳别，谓之有子。此乃气血调和，阳施阴化也。叔和云∶脉平而虚，乳子法也。诊其
脉，左少阴动甚者，妊子也。夫手少阴，心脉也，心主血。足少阴，肾脉也，肾为胞门子户。大抵少阴经左手属
心，左足属肾。下主乎尺，尺中按之不绝者，有妊也。
潘硕甫曰∶女人以血为本，血旺是为本足，气旺则血反衰。故女人以血胜气者为贵。少阴动甚者，手少阴之
脉也。心主血，动甚则血旺，血旺易胎，故云有子，即《内经》所谓妇人手少阴脉动甚，妊子是也。尺脉者，左
尺足少阴肾之脉也。肾为天一之水，主子宫以系胞，孕胎之根蒂也。滑利则不枯涩，有替替含物之象，故妊娠。
即经所谓阴搏阳别，谓之有子。叔和所谓尺中之脉，按之不绝，同义也。即此滑利之脉，应指疾而不散。滑为
血液，疾而不散，乃血液敛结之象，是为有胎三月。若但疾而不散，是从虚渐实，血液坚凝，转成形体，故不滑，
此妊娠五月之脉也。
The *Suwen* (Basic Questions) states: In women, if the pulse of the Foot Shaoyin meridian is markedly active, it indicates pregnancy. It further states: When the Yin pulse (radial/chi position) beats forcefully and is distinct from the Yang pulse (cun/guan position), it signifies conception.
Wang Bing (Grand Master Wang) explains: The Foot Shaoyin corresponds to the Kidney meridian. "Active" refers to a pulsation that feels like a bean quivering or jumping. "Yin" refers to the chi position (distal radial pulse). "Bo" (beat/pulse) refers to the sensation of the pulse striking the fingers. If the chi pulse beats strongly and differs significantly from the cun pulse, this is a sign of pregnancy.
The *Nanjing* (Classic of Difficult Issues) states: In women, the Kidney connects to the uterus (Bao). If the pulses at the three positions (cun, guan, chi) are equal in floating and sinking quality, and unceasing upon heavy pressure, it indicates pregnancy.
Wang Shuhe states: In women, if the pulses at the three positions are neither too floating nor too sunken, and do not cease upon heavy manual pressure, it indicates pregnancy. At the early stage of pregnancy, the cun pulse is slightly weak, with five breaths per pulse cycle, while the chi pulse is rapid. A slippery and rapid pulse that does not disperse under heavy pressure indicates a fetus of three months. A pulse that does not disperse under heavy pressure but is only rapid without being slippery indicates five months. This aligns with the meaning of "Yin bo yang bie." It means the chi pulse is slippery and rapid, the cun pulse is slight and small, and the distinction between chi and cun pulses characterizes the pregnant pulse.
Qi Zhongfu states: The classic text says, "Yin bo yang bie, wei zhi you zi" (When Yin beats distinctly different from Yang, it signifies conception). This results from the harmonization of Qi and Blood, where Yang acts and Yin transforms. Wang Shuhe noted that a pulse that is level and empty is characteristic of lactation. Upon palpation, if the Left Shaoyin pulse is markedly active, it indicates pregnancy. The Hand Shaoyin corresponds to the Heart meridian, which governs Blood. The Foot Shaoyin corresponds to the Kidney meridian, which serves as the gate of the uterus and the house of offspring. Generally, the Left Hand Shaoyin relates to the Heart, and the Left Foot Shaoyin relates to the Kidney. The lower part corresponds to the chi position; if the chi position remains unceasing upon pressure, it indicates pregnancy.
Pan Shuofu states: Women take Blood as their root substance; abundant Blood constitutes the fundamental strength, whereas excessive Qi may lead to relative Blood deficiency. Therefore, it is auspicious for women to have Blood prevailing over Qi. "Shaoyin activity marked" refers to the Hand Shaoyin pulse. The Heart governs Blood; marked activity implies abundant Blood, and abundant Blood facilitates conception, hence "having a child." This corresponds to the statement in the *Neijing*: "If the Hand Shaoyin pulse of a woman is markedly active, she is pregnant." The chi pulse refers to the Foot Shaoyin Kidney pulse on the left. The Kidney represents the Water of Heaven and Earth, governing the uterus and connecting to the fetus; it is the root of gestation. A slippery and free-flowing pulse indicates moisture rather than dryness, resembling a state of fullness containing something, thus indicating pregnancy. This matches the classic saying: "Yin bo yang bie, wei zhi you zi." It shares the same meaning as Wang Shuhe's statement that the chi pulse does not cease upon pressure. Regarding this slippery pulse, it should feel rapid upon the finger but not disperse. Slipperyness indicates Blood; rapidity without dispersion suggests the gathering and condensation of Blood, indicating a three-month pregnancy. If the pulse is merely rapid without slipperiness, it signifies a transition from deficiency to excess, where Blood becomes firm and coagulated, transforming into physical form, hence lacking slipperiness. This characterizes the pulse of a five-month pregnancy.