Hamburger Hamilton Stages - Sonidel

amniotic fold1752-64 hr29-32 somites; legbud; epiphysis183 da30-36 somitesextending beyondlevel of leg bud;allantois193.0-3.5da37- 40 somitesextending into tail;maxillary process203.0-3.5da40-43 somites;rotation completed;eye pigment213.5 da43-44 somites;visceral arch IV,cleft 4223.5-4.0daSomites extend totip of tail234 daDorsal contourfrom hindbrain totail is a curved line244.5 da Toe plate254.5-5.0daElbow and kneejoints265 da 1st 3 toes275.0-5.5daBeak285.5-6.0da3 digits, 4 toes296.0-6.5daRudiment of 5thtoe

306.5-7.0daFeather germs;scleral papillae;egg tooth317.0-7.5daWeb between 1stand 2nd digits327.5 daAnterior tip ofmandible hasreached beak337.5-8.0daWeb on radialmargin of wing and1st digit348 daNictitatingmembrane358.5-9.0daPhalanges in toes3610 daLength of 3rd toefrom tip to middleof metatarsal joint= 5.4±0.3mm;length of beakfrom anterior angleof nostril to tip ofbill = 2.5mm;primordium ofcomb; labialgroove; uropygialgland3711 daLength of 3rd toe =7.4±0.3mm; lengthof beak = 3.0 mm3812 daLength of 3rd toe =8.4±0.3 mm;length of beak =3.1 mm

3913 daLength of 3rd toe =9.8±0.3 mm;length of beak =3.5 mm4014 daLength of beak =4.0 mm; length of3rd toe = 12.7±0.5mm4115 daLength of beakfrom anterior angleof nostril to tip ofupper bill = 4.5mm; length of 3rdtoe = 14.9±0.8 mm4216 daLength of beak =4.8 mm; length of3rd toe = 16.7±0.8mm4317 daLength of beak =5.0 mm; length of3rd toe = 18.6±0.8mm4418 daLength of beak =5.7 mm; length of3rd toe = 20.4±0.8mm4519-20daYolk sac halfenclosed in bodycavity;chorio-allantoicmembranecontains less bloodand is "sticky" inliving embryo4620-21daNewly-hatchedchick