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|[[File:Mark_Hill.jpg|50px|left]] This historic 1944 paper by {{Rock J.}} and Menkin describes one of the earliest clinical investigations of in ...0px|link=Embryology History - John Rock|alt=John Charles Rock|John Charles Rock (1890-1984)]]

[[File:John Rock.jpg|thumb|alt=John Charles Rock|John Charles Rock (1890-1984)]] John Charles Rock (1890-1984) was a Boston gynaecologist and human fertility researcher. In 1

His early papers were often co-authored with [[#John Rock|John Rock]] and included embryos that were incorporated into the [[Carnegie Collectio ...0px|alt=John Charles Rock|link=Embryology History - John Rock|John Charles Rock (1890-1984)]]

...rred to the publications of Hamilton (1944) and Rock and Menkin (1944) and Rock and Hertig (1948). ...s been made by the researches of Hertig and Rock (1941, 1944 and 1945) and Rock and Hertig (1942, 1944 and 1948). Other early human embryos have recently b

|[[File:Mark_Hill.jpg|50px|left]] This historic 1944 paper by {{Rock J.}} and Menkin describes one of the earliest clinical investigations of in ...ology History - Arthur Hertig#John Rock|alt=John Charles Rock|John Charles Rock (1890-1984)]]

is complete, unlike that in the 11.5 day Hertig-Rock ovum,“ and, together with the endodermal layer of the germ disc, it enclo ...er of the disc would be 0.117 mm.; that of the disc in the 11.5 day Hertig-Rock ovum is 0.138 mm. At the edge of the disc the ectodermal cells suddenly cha

...a myomatous uterus; two other ova were recovered by Pincus and Saunders.“ Rock and Hertig‘ report the recovery of an unfertilized ovum, but do not give ...Hertig and Rock,“ and more recently the account of young embryos given by Rock and Hertig,‘ the youngest human embryo was the “ Miller” described by

...n embryos at different stages of development. To Dr A. T, Hcrtig and Dr J. Rock we are indebted for photographs of early human embryos. We are especially i

...shrinkage of as much as 50 percent may occur in some instances (Menkin and Rock, 1948{{#pmid:18903892|PMID18903892}}). Whether before or after fixation, th * 2 cells Carnegie No. {{CE8260}}. Described by Menkin and Rock (1948){{#pmid:18903892|PMID18903892}}. Produced in vitro. Diameter, 153 x 1

...n my privilege to study these excellently preserved embryos. As Hertig and Rock are preparing a description of the specimens I shall refer to them only bri Hn:1t.T1G, A. 'l‘., AND J. C. ROCK 1938 On a con1p1ete normal 12-day human ovum of the p1'c~vil10us stage. Aun

...by Hoadley & Simons (1928); the nucleus was at the ‘mesophase’. Recently, Rock & Hertig (1942) report having recovered two oocytes at the first maturation ...receding one (see Knaus, 1934; Ogino, 1934; Pryde, 1941; and Smith, 1942). Rock & Hertig (1942), by comparing the ages of young embryos with the associated

...it appears to be more developed than embryo No. 7801 (13; days) of Heuser, Rock and Hertig (1945), of about the same stage as the Yale embryo (14 days) (Ra ...e human definitive yolk-sac intermediate between that described by Hertig & Rock (1941) for ovum No. 7700 (12% days) and that by Brewer (1938) for the 15-da

...n embryos at different stages of development. To Dr A. T, Hcrtig and Dr J. Rock we are indebted for photographs of early human embryos. We are especially i

...urrent" research circa 1919 in primate embryology. Describes embryo Hertig-Rock No. 1 {{CE8004}} ...umber of young human ova have recently been described - that of Hertig and Rock (about 11 days old) being the most perfect known to science. Ramsey (Yale o

...ich were secured through the cooperation of Dr. A. T. Hertig and Dr. J. C. Rock, only a brief note will be made at this time. They were obtained surgically ...obtained significance of this space and the memthrough Dr. Hertig and Dr. Rock made brane enclosing it has not yet been deit necessary to re-study the Mil

9. HERTIG, A. T., and ROCK. 1941. Two human ova of the pre—villous stage, having an ovulation age of 10. HERTIG, A. T., J. ROCK, and E. C. ADAMS. 1956. A description of 34 human ova within the first 17

...the mechanical or materialistic explanation, which is based on the solid, rock-like foundation that life phenomena can be explained as originating from ma

...s of our specimen also resemble those of the Carnegie 7801 embryo (Heuser, Rock & Hertig, 1945), except for the greater degree of histological development

...X. The ovaries were fixed in Gilson and McC'lendon. In the Barred Plymouth Rock ovary the different discharged follicles were sectioned separately and arra ...ling at the sudden release of pressure from inside. On the Barred Plymouth Rock ovary, the ripe yolk measured about 40 mm. in diameter, and the last discha

...ge of the human zygote x 500 (Reproduced by the courtesy of Drs Hertig and Rock ) ...astomeres which resulted from in vitro fertilization of human ovarian ova (Rock and Hertig, ^94^) It IS necessary, therefore, to refer to other mammalian m