Using the number of yolk sacs to determine amnionicity in early first trimester monochorionic twins.
![Placenta examination. (a) Macroscopic view of DiDi twin placenta, with... | Download Scientific Diagram Placenta examination. (a) Macroscopic view of DiDi twin placenta, with... | Download Scientific Diagram](https://www.researchgate.net/profile/Brunella-Guerra/publication/289540604/figure/fig1/AS:391353998561291@1470317472566/Placenta-examination-a-Macroscopic-view-of-DiDi-twin-placenta-with-the-two-sacs.png)
Placenta examination. (a) Macroscopic view of DiDi twin placenta, with... | Download Scientific Diagram
![Botany for agricultural students . Botany. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen Botany for agricultural students . Botany. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen](https://c8.alamy.com/comp/PG3T66/botany-for-agricultural-students-botany-stamen-461-stamen-the-stamen-microsporophyll-has-its-pollen-sacs-microsporangia-usually-four-in-number-joined-into-the-struc-ture-called-anther-the-pollen-grains-microspores-are-numer-ous-in-each-sac-and-are-formed-before-the-flower-opens-like-the-spores-of-gymnosperms-pteridophytes-and-bryophytes-they-are-formed-by-special-cells-known-as-mother-cells-of-which-there-are-many-in-each-pollen-sac-as-shown-at-a-in-figure-408-these-mother-cells-also-divide-by-the-reduction-division-that-is-by-the-kind-of-cell-division-in-which-the-da-PG3T66.jpg)
Botany for agricultural students . Botany. STAMEN 461 Stamen. — The stamen (microsporophyll) has its pollen sacs (microsporangia), usually four in number, joined into the struc- ture called anther. The pollen
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Text-book of botany, morphological and physiological . Fig 346.—-4 pollen-sa: of Althaa rosea seen from the side; B transverse section of an anther-lobe showing thetwo pollen-sacs, m the mother-cells of the pollen,
![Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 489 The Eleventh Day Stage. At about the middle of the eleventh day of development the lungs and air-sacs show the effect of more rapid Anatomischer Anzeiger. Anatomy, Comparative; Anatomy, Comparative. 489 The Eleventh Day Stage. At about the middle of the eleventh day of development the lungs and air-sacs show the effect of more rapid](https://c8.alamy.com/comp/RN7W75/anatomischer-anzeiger-anatomy-comparative-anatomy-comparative-489-the-eleventh-day-stage-at-about-the-middle-of-the-eleventh-day-of-development-the-lungs-and-air-sacs-show-the-effect-of-more-rapid-growth-the-air-sacs-as-shown-in-fig-6-are-relatively-much-larger-than-in-prece-ding-stages-the-prebronchial-sac-pr-now-begins-to-expand-at-its-distal-end-the-mesial-moiety-s-1-of-the-sub-bronchial-sac-is-divided-at-its-extremity-into-two-lobe-like-bronches-the-more-mesial-of-these-fig-6-ventral-view-of-uninjected-luugs-of-ten-and-one-half-day-embryo-shows-the-air-sacs-and-t-RN7W75.jpg)