Pivotal periods for pregnancy loss during the first trimester of gestation in lactating dairy cows

MC Wiltbank, GM Baez, A Garcia-Guerra, MZ Toledo… - Theriogenology, 2016 - Elsevier
Loss of pregnancy can occur at many different stages of gestation and for a variety of causes
but clearly produces a negative impact for reproductive and economic performances of dairy …

[PDF][PDF] Current progress in oocyte and embryo cryopreservation by slow freezing and vitrification

J Saragusty, A Arav - Reproduction, 2011 - materbaby.hospitalalmodin.com.br
Preservation of female genetics is currently done primarily by means of oocyte and embryo
cryopreservation. The field has seen much progress during its four-decade history, progress …

Mechanism of spindle pole organization and instability in human oocytes

C So, K Menelaou, J Uraji, K Harasimov, AM Steyer… - Science, 2022 - science.org
Human oocytes are prone to assembling meiotic spindles with unstable poles, which can
favor aneuploidy in human eggs. The underlying causes of spindle instability are unknown …

Neuronal subtypes and diversity revealed by single-nucleus RNA sequencing of the human brain

BB Lake, R Ai, GE Kaeser, NS Salathia, YC Yung… - Science, 2016 - science.org
The human brain has enormously complex cellular diversity and connectivities fundamental
to our neural functions, yet difficulties in interrogating individual neurons has impeded …

[HTML][HTML] Piwi proteins and piRNAs in mammalian oocytes and early embryos

EF Roovers, D Rosenkranz, M Mahdipour, CT Han… - Cell reports, 2015 - cell.com
Germ cells of most animals critically depend on piRNAs and Piwi proteins. Surprisingly,
piRNAs in mouse oocytes are relatively rare and dispensable. We present compelling …

[HTML][HTML] Reproductive physiology of the heat-stressed dairy cow: implications for fertility and assisted reproduction

PJ Hansen - Animal Reproduction, 2019 - SciELO Brasil
Heat stress causes a large decline in pregnancy success per insemination during warm
times of the year. Improvements in fertility are possible by exploiting knowledge about how …

Genome activation in bovine embryos: review of the literature and new insights from RNA sequencing experiments

A Graf, S Krebs, M Heininen-Brown… - Animal reproduction …, 2014 - Elsevier
Maternal-to-embryonic transition (MET) is the period in early embryonic development when
maternal RNAs and proteins stored in the oocyte are gradually degraded and transcription …

[HTML][HTML] An oviduct-on-a-chip provides an enhanced in vitro environment for zygote genome reprogramming

MAMM Ferraz, HS Rho, D Hemerich… - Nature …, 2018 - nature.com
Worldwide over 5 million children have been conceived using assisted reproductive
technology, and research has concentrated on increasing the likelihood of ongoing …

[HTML][HTML] Formation of spermatogonia and fertile oocytes in golden hamsters requires piRNAs

Z Loubalova, H Fulka, F Horvat, J Pasulka, R Malik… - Nature Cell …, 2021 - nature.com
PIWI-interacting RNAs (piRNAs) support the germline by suppressing retrotransposons.
Studies of the pathway in mice have strongly shaped the view that mammalian piRNAs are …

[HTML][HTML] Transcriptional profiles of bovine in vivo pre-implantation development

Z Jiang, J Sun, H Dong, O Luo, X Zheng, C Obergfell… - BMC genomics, 2014 - Springer
Background During mammalian pre-implantation embryonic development dramatic and
orchestrated changes occur in gene transcription. The identification of the complete changes …