Module anatomy_dyad 

The maternal–fetal dyad: a maternal body coupled to a developmental (fetal) body at a gestational age, positioned at the maternal host structure (the uterus). This is the consideration made explicit — the fetus modelled as part of the female-anatomy picture, not scoped out: two coupled bodies across space and the developmental t-axis (reproductive-continuum plan §2/§3.3).

The maternal body is the HRA female model; the fetal body is a NIH 3D Carnegie stage (crate::wellfair::fetal_stages). Placement here is illustrative: the two meshes come from different sources in different scales, so an anatomically-registered placement needs real-world-scale metadata on both (a follow-up). What this demonstrates is the coupling + a computed transform that seats the embryo inside the uterine frame.

Structs

DyadPlacement

A computed transform seating a (centroid-origin) fetal mesh within a host (uterine) frame.

MaternalFetalDyad

The dyad: which maternal body, which host structure, and the fetal body’s point on the t-axis.

Functions

place_within

Compute an illustrative placement of a fetal mesh within a host frame: centre it at the host centroid, scaled so its largest extent fills fill (0..1) of the host’s smallest extent (so it sits inside). Pure. Illustrative only — see the module note on scale registration.