OnclerstezJoort Journal of Tleterinm·y Science and Animal Industry, r olume i . . Y1m1ber 1, l1tly, 193G.
S tudies 1 n S ex Physiology, No. 14.
The Situation of the Developin g Foetus in the Uterus of the Live Me rino Sheep.
By H. H. C.THSO::\ :tll<l J. qr l::\LA::\. Section of Smgery and
Oh~lel ric~ illdn<1ing Sex Ph~·~iolog·~·. ( lncle1 stepomt.
l.\" a preYHlllS shul~· (Cur~ou mHl Quinlan, Hl34). the opmJon ,,·as expressed tha l i lw Ill o:>t ;-;u ita hl e ti JUP to gain kno"'' leclge conc:erni ng the situntiou of tlw c1eYelopinp; fuetu~ IHJ-ulcl he chuing life. Such au opportunity presenlecl itself \Yheu ,;hef'lJ D.O.B. JiiS2 mul D.O.B.
~{i£):31 wPre made aYailahle for :X-roy examination.
A.ecorcling· to Are.1· (19:31) hone begin;; to appenr in man n±ter the seYenih IYel-'k, c"O thP Jir"l .atlPmpt to X-wy the deYeloping foptus 11as left to the .')9th c1a.' (Sheep :n7R2), but no foetal skeleton was ohserYecl. AC'lnalh- cenhc's of ·ossifiC"ation in the 'Jiel'ino foetus HWY be seen in the metacarpal uml metatar.-;al l)()nes as emly a:-; the 4-:iih cby.
\\'hile the lnteral 1·ecnmbent position \HJulcl hn1·e suited best for photography, it "·a~ con" i d erecl that t 1w mo~t re lia h 1 e picture 11·onlcl he obtained hy photop,Tnp 11 i ng- the 1l terus transH'tsely \\·hile the e\Ye \\'liS in the stnnrling position. In tl1is way uterine clisplaC"e- JJJPlJt ,,·as olwiated.
The e\Ye, cluring the taking- of tl1e photographs, \Yas kept on a ration lmY in ro11ghage (n little teff bay). so as to rellnrP the hnns- Yerse cliameter of the nmH'n. In addition ~ lb. c·rusl1Pd oat<', } lh. crushed maize, nnc1 a little gTet-'n harley per rl£em was given. No food or "·ater "·as allo"·ecl rlnring the 24 honn; prior io photographing·.
'l'he ewe was strap1wcl loosely in the standing posture to a rotary Potter-Rueh,'l· diaphragm. The exposure \Yas as follo"·s: - K.V. 90; 'JI.A. 200: ti 111e 0 · 2 ser·oncls: distance 30 inches nncl supra-screens
\\·ere used. Long'el· expo,;1nes than 0 · 2 seconds \Yere unsatisfactory owing to the blurring of the negati Ye by respirator,\· moYempnts nnd seconda1·y rays.
Penetratio11 of the contents of the rumen is not easv at such low kilovoltages as IYill not completely penetrate the clevel~ping bones.
227
STliJJll-:S TS SEX PHYSlOI.O(<Y, XO. 14.
The sit·untion of the foe1 use,; at lhe Ynriou,; in1t>rYals "·a~ <IS follOIYS;-
]'.-'tee 37782 (sen-erl 21st _-!u.r;ust, HH:J.)
:Fig. (1:) d<tys). l'rrsl'!ltullon po~1eli<ll : f10sillon of foetus h11nhu-i lin<".
Fig. :2 (87 dnys). Jl,·csenlollon ;uderior: fi!Js/iloll of joeh1s clorso- ilio-puhic.
Fig. :) (JOI d<tys). l'rl's!'ll/ri/1()11 nn1t>rior; fil!sllioll of foe/us
<lorso-s<tcJ·;d "·ith L11e1<tl ceph;ili(' I01<11ion. F1g-. 4 (1:2~) da:'i·::;). l'resel/t({IJon po~terior; flO·'·/! loll of foeitts
lu 111ho-puhi(".
F1g-. 'I (J:l-± <Liys). l'resentrttiOII anterior: fili.</iloll of joe/11x
<lor.-;o-il i ac.
On thP l..J.:ln<l daY ll()I!J T<lllll<HY, 1\H-J.). a 1<'1111 lnn1b (D.O.IL 3o8,:J3) was born. ··
!')tee 07931 (srrrcd .)t h Si'plcllzber, ] ~)33.)
Fig·. (i (U:.? d<t,l'"). l'rcscntatlon anterior; jiOsil/on of focltts dor,;o-ili<tc.
Fig-. I ( lJ..J.. <l<~.n;). l'u'sr•JII({//o/1 anterior; J!Osilloll of foe/tis dor.<o-i I io-,;;~n;ll.
Fig.
s
(1 I ~) <);I)'S). l'r"sr•nfrttlon posteJ·ior; Ji0.,·/1/on of foetusdorso-ilio-puhi<·.
I'i,!..t. !) (l..J. () <b.1·s, tn k<·n ,I( !). I.) <1.111.). Prrsr•l/t({/ioll un1E'rior;
j:Osliloll of /oeltts do rso-i l i o-puh i r·.
17ig·. 10 CI-t() days~ laken :3 p.ln.). l)resentol/on anterlor:
fJOsltion of fo< t11s dorso-puhic.
On thP J.'J{)tll <lay (2n<l FE'hn1:1l'~-, nH4), tlw feJnale lnmh 28!h9 11·as horn.
It "·ill be see11 at Olli'E' <lf1Pr ,;in<h ino· the abo,·e fig·ures that the
" <1Pfiiw<1 position·· ol Frm11·k (qno1P<( h_,. De Hn1in) or .. YE'r.\·
ne;nly I'Onstant po"ition of ('rni.g' 1li<l not nppl.1 to the e\\"e;; in CJ.UE'S- tion. Apart· ho111 the nliPrations of 1l1E' foebl position the Jn·esen- tation achwll)· d1:1ngr<l t·l1rer times (BwP 31782) nnd h\·icf' (E\\"e 87!J:ll) respedi,·el~-, n,.; reconlP<l h\· ilH' X-1'<1_1. photogTfl]lhs. I-To11·
many times there \\'l'l'P <llteJ·:Jtions i11 pn•sentation <luring· tllf' in1E'l'Y;Jl.-;
it. is impos,.;ibh• to ,.;n)· There is 1hPn>fore no <lonht hut th;d· 1hP ,.;ih1ation of tl1<' fof'tu,.; Yaries <I QTPa1 <le:Jl. Thf' factors, ho,,·eY<'r, 1111<lerling' the r<>p;ulation of foP!~l .-;ituntinn :n·p not dearl:'i· llllrlPl'- stoo<l. In t·he <"il·<·umsl:-~n<·Ps it i~ ]Wrhr1ps hPlp£111 io r01npa1·e ihe fop(us In vtero ton ship at anl'hor, ,,·hil'h moYes 011 the nll<:hor as 1l1e f'un:ents ancl \\"in<ls romp<>l. In the foetus, l1o"-·eyer. there is in adcld·ion some fador "·l1irh in the final st:1p;es lwing!" nho11t f'ephnlic·
pre sen ta tion.
H. H. CURSON AND J. QUINLAN.
The photographs are reduced approximately to !:me-sixth of the original and details are therefore not as distinct as in the X-ray negatives.
vVe are much obliged to Mr. '1'. ~feyer for making the prints.
REFERENCES.
AREY, L. B. (1931). nerelopmental ,-!natomy. ,V. B. Saunders Co., London.
CRAIG, J. F. (1930). z,•zeming's VeterinaTy Obstetrics. 4th Edit., p. 106.
Bailliere Tmdall & Cox, London.
CURSON, H. H., AND QL'I::\LAN, J. B. (1934). Studies in Sex Physiology No. 10: The ~ituation of the Developing Foetus in the Merino Sheep.
Ondenfepoort Jl. Vet. Sc. and Anim. Ind., Vol. 2, No. 2.
WYMAN, W. E. A. (1901). De l3Tuin's Bovine ObstetTics. William R.
Jenkins, :1\ew York.
Fig. I.
229
STrJJJES IK SEX PHYSIOLOGY, XO. 14.
lfig. 2.
H. H. CullSON XXD J. QUINLAK.
Fig. 3.
· 23i
STUDIES IN SEX PHYSIOLOGY, KO. 14.
Fig. 4.
H. H. CURSO~ AND J. Q"C"INLA~.
Fig. 5.
233
STlTJJTES lK SEX PHYSfOl.OGY, KO. 14.
Fig. G.
H. II. C"CRSOX AXD J. Q1"1XLAN.
Fig. 7.
235
ST"C"JJlES lK SEX PHYSlOLOGY, XO. 14.
Fig. 8.
I-I. H. CUllSON AXJJ J. QL"IKLAX.
Fig. 9.
237
SlTJ)]F.S 1::'\ SEX PHYSIOLOGY, KO. 14.
Fig. 10.
