(untitled)

Address these matters already.

(Quoting myself in an old post elsewhere) > While the perineal raphe does seem to be an anatomical reference point for both sexes, "the raphe is not evident in females" according to one Japanese source [currently included in Anatomy & Trauma]. Work-in-progress explanation: When the perineum's outermost cutaneous (skin) layer fails to join together embryologically, then that's considered failed fusion, resulting in something like perineal groove. Repairing that might leave an evident indication, which someone might call "a prominent perineal raphe" (as in Wikipedia's "human anus" article). Of course, as I noted that could instead be a result of surgical or other trauma (and perhaps subsequent healing e.g. with stitches). Possibilities include an episiotomy, complete anal sphincter complex disruption ("a laceration at the anal mucosa, extending through the entire thickness of the anal sphincter complex into the vagina"), and perhaps many more (e.g. any procedure that involves cutting along the anogenital perineal midline, as a sphincterotomy and perianal fistulotomy may). In normal cases there is no obvious seam in biological females. In biological males on the other hand there may be an obvious, raised seam due to more fusion happening embryologically at least with the bulbospongiosus and urogenital folds.

One or more of these soon may be referenced by that paste: "Perineal groove is a rare congenital wet sulcus extending from the fourchette to the anus. With awareness of the lesion, surgery can be avoided. Perineal canal is a congenital anorectovestibular fistula coexistent with normal anus. Recently, it has become evident that these lesions are relatively common and clinically important variants of anorectal anomalies. We now report one patient each with these anomalies and briefly review the surgical problems." "Perineal groove and perineal canal." The Japanese Journal of Surgery. 1983 May; 13(3): 216-8. PMID 6632394. doi:10.1007/bf02469480. "Perineal groove." Journal of Pediatric Surgery. 2006 Mar; 41(3): e41-3. PMID 16516615. doi:10.1016/j.jpedsurg.2005.12.068. "We present a case where a baby girl was born with failure of fusion of the perineal raphe. To our knowledge, there has been limited reports of this form of congenital abnormality in the literature and is referred to as "perineal groove." The incidence of perineal groove is unclear but it is considered to be rare. This case reviews the embryological origin of this congenital abnormality." "Perineal groove: A rare congenital abnormality of failure of fusion of the perineal raphe and discussion of its embryological origin." Clinical Anatomy. 2009 Oct; 22(7): 823-5. PMID 19753644. doi:10.1002/ca.20855. "Perineal groove: a report of 2 cases." JAMA Dermatology. 2014 Jan; 150(1): 101-2. doi:10.1001/jamadermatol.2013.4613. (PMID 24026394) "Pathogenesis of perineal groove remains unclear. However, embryological mechanisms have been proposed as follows: (1) a relic of the open cloacal duct, (2) midline fusion failure of medial genital folds between the perineal raphe and the vestibule, and (3) urorectal septum developmental defect during cloacal embryological stages at 5th to 8th week of GA [gestational age]. Given that the perineal groove anomaly was also reported in one male infant, this congenital anomaly can be derived during the embryological development stage of external genitalia. External genitalia of both sexes are developed from the genital tubercle, genital folds, and labioscrotal folds. Therefore, failure of labioscrotal folds fusion to form perineal raphe will cause perineal groove to occur." "Perineal Groove: A Rare Congenital Midline Defect of Perineum." American Journal of Perinatology Reports. 2016 Mar; 6(1): e30-e32. PMC4737640. doi:10.1055/s-0035-1566311. "Perineal Groove: Report of Two Cases and Review of the Literature." Frontiers in Pediatrics. 2018 Aug 15; 6: 227. PMC6104166. doi:10.3389/fped.2018.00227. "Four Cases of Perineal Groove—Experience of a Greek Maternity Hospital." Medicina. 2019 Aug 15; 55(8): 488. PMC6724277. doi:10.3390/medicina55080488. "Clinical characteristics and conservative treatment of perineal groove." Journal of Pediatric Surgery. 2020 Aug; 55(8): 1507-1510. doi:10.1016/j.jpedsurg.2019.07.017. (PMID 31443920) "Congenital Perineal Groove Defect in Monozygotic Twin Infants: A Literature Review." American Journal of Perinatology Reports. 2021 Jan; 11(1): e54-e57. PMC8012879. doi:10.1055/s-0041-1727145. "Newborn twins with perineal grooves." SAGE Open Medical Case Reports. 2021 May 30; 9: 2050313X211020222. PMC8170287. doi:10.1177/2050313X211020222. "Perineal Groove: Is It More Common Than We Think? Clinical Characteristics of Four Cases and Review of Literature." Pediatric Reports. 2021 Sep; 13(3): 490-494. PMC8396188. doi:10.3390/pediatric13030056.