Female age-specific reproductive rates, birth seasonality, and infant mortality of ring-tailed Lemurs on St. Catherines Island: 17-year reproductive history of a free-ranging colony

Zoo Biology ◽  
2005 ◽  
Vol 24 (4) ◽  
pp. 295-309 ◽  
Author(s):  
Joyce A. Parga ◽  
Robert G. Lessnau
Keyword(s):  
Infant Mortality ◽  
Reproductive History ◽  
Birth Seasonality ◽  
Female Age ◽  
History Of ◽  
Reproductive Rates ◽  
Free Ranging

Leave the past behind: women’s reproductive history shows no association with blastocysts’ euploidy and limited association with live birth rates after euploid embryo transfers

2021 ◽  
Author(s):  
Danilo Cimadomo ◽  
Antonio Capalbo ◽  
Lisa Dovere ◽  
Luisa Tacconi ◽  
Daria Soscia ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Live Birth ◽  
Maternal Age ◽  
Oocyte Retrieval ◽  
Reproductive History ◽  
Blastocyst Transfer ◽  
Blastocyst Development ◽  
Live Birth Rates ◽  
History Of ◽  
Euploid Embryo

Abstract STUDY QUESTION Is there an association between patients’ reproductive history and the mean euploidy rates per biopsied blastocysts (m-ER) or the live birth rates (LBRs) per first single vitrified-warmed euploid blastocyst transfers? SUMMARY ANSWER Patients’ reproductive history (as annotated during counselling) showed no association with the m-ER, but a lower LBR was reported after euploid blastocyst transfer in women with a history of repeated implantation failure (RIF). WHAT IS KNOWN ALREADY Several studies have investigated the association between the m-ER and (i) patients’ basal characteristics, (ii) ovarian stimulation strategy and dosage, (iii) culture media and conditions, and (iv) embryo morphology and day of full blastocyst development. Conversely, the expected m-ER due to women’s reproductive history (previous live births (LBs), miscarriages, failed IVF cycles and transfers, and lack of euploid blastocysts among prior cohorts of biopsied embryos) still needs investigations. Yet, this information is critical to counsel new patients about a first cycle with preimplantation genetic testing for aneuploidy (PGT-A), but even more so after former adverse outcomes to prevent treatment drop-out. STUDY DESIGN, SIZE, DURATION This observational study included all patients undergoing a comprehensive chromosome testing (CCT)-based PGT-A cycle with at least one biopsied blastocyst in the period April 2013-December 2019 at a private IVF clinic (n = 2676 patients undergoing 2676 treatments and producing and 8151 blastocysts). m-ER were investigated according to women’s reproductive history of LBs: no/≥1, miscarriages: no/1/>1; failed IVF cycles: no/1/2/>2, and implantation failures after previous transfers: no/1/2/>2. Among the 2676 patients included in this study, 440 (16%) had already undergone PGT-A before the study period; the data from these patients were further clustered according to the presence or absence of euploid embryo(s) in their previous cohort of biopsied blastocysts. The clinical outcomes per first single vitrified-warmed euploid blastocyst transfers (n =1580) were investigated according to the number of patients’ previous miscarriages and implantation failures. PARTICIPANTS/MATERIALS, SETTING, METHODS The procedures involved in this study included ICSI, blastocyst culture, trophectoderm biopsy without hatching in Day 3, CCT-based PGT-A without reporting segmental and/or putative mitotic (or mosaic) aneuploidies and single vitrified-warmed euploid blastocyst transfer. For statistical analysis, Mann–Whitney U or Kruskal–Wallis tests, as well as linear regressions and generalised linear models among ranges of maternal age at oocyte retrieval were performed to identify significant differences for continuous variables. Fisher’s exact tests and multivariate logistic regression analyses were instead used for categorical variables. MAIN RESULTS AND THE ROLE OF CHANCE Maternal age at oocyte retrieval was the only variable significantly associated with the m-ER. We defined five clusters (<35 years: 66 ± 31%; 35–37 years: 58 ± 33%; 38–40 years: 43 ± 35%; 40–42 years: 28 ± 34%; and >42 years: 17 ± 31%) and all analyses were conducted among them. The m-ER did not show any association with the number of previous LBs, miscarriages, failed IVF cycles or implantation failures. Among patients who had already undergone PGT-A before the study period, the m-ER did not associate with the absence (or presence) of euploid blastocysts in their former cohort of biopsied embryos. Regarding clinical outcomes of the first single vitrified-warmed euploid blastocyst transfer, the implantation rate was 51%, the miscarriage rate was 14% and the LBR was 44%. This LBR was independent of the number of previous miscarriages, but showed a decreasing trend depending on the number of previous implantation failures, reaching statistical significance when comparing patients with >2 failures and patients with no prior failure (36% versus 47%, P < 0.01; multivariate-OR adjusted for embryo quality and day of full blastocyst development: 0.64, 95% CI 0.48–0.86, P < 0.01). No such differences were shown for previous miscarriage rates. LIMITATIONS, REASONS FOR CAUTION The sample size for treatments following a former completed PGT-A cycle should be larger in future studies. The data should be confirmed from a multicentre perspective. The analysis should be performed also in non-PGT cycles and/or including patients who did not produce blastocysts, in order to investigate a putative association between women’s reproductive history with outcomes other than euploidy and LBRs. WIDER IMPLICATIONS OF THE FINDINGS These data are critical to counsel infertile couples before, during and after a PGT-A cycle, especially to prevent treatment discontinuation due to previous adverse reproductive events. Beyond the ‘maternal age effect’, the causes of idiopathic recurrent pregnancy loss (RPL) and RIF are likely to be endometrial receptivity and selectivity issues; transferring euploid blastocysts might reduce the risk of a further miscarriage, but more information beyond euploidy are required to improve the prognosis in case of RIF. STUDY FUNDING/COMPETING INTEREST(S) No funding was received and there are no competing interests. TRIAL REGISTRATION NUMBER N/A.

Reproductive History of Mothers of Children with Solitary, Nonsyndromic Cleft Lip and/or Palate

1992 ◽  
Vol 29 (5) ◽  
pp. 470-474 ◽  
Author(s):  
Bente Felix-Schollaart ◽  
Jan B. Hoeksma ◽  
Jean Paul Van De Velde ◽  
Jerôme I. Puyenbroek ◽  
Birte Prahl-Andersen
Keyword(s):  
Maternal Health ◽  
Cleft Palate ◽  
Vaginal Bleeding ◽  
Cleft Lip ◽  
Cleft Lip And Palate ◽  
Fetal Loss ◽  
Reproductive History ◽  
Drug Consumption ◽  
Spontaneous Abortions ◽  
History Of

The reproductive history was studied to evaluate if the three types of solitary, nonsyndromic clefts: cleft lip (CL), cleft lip and palate (CLP), and cleft palate (CP) are homogeneous entities. Occurrence of fetal loss, maternal health, and drug consumption of the mother during the pregnancy were compared in cases involving three types of clefts. Data was gathered from 87 children with clefts, 55 males and 32 females. Spontaneous abortions and vaginal bleeding were found to occur significantly more often in the (older) mother of a CLP child. This suggests that the factors involved in the etiology of CLP differ from the factors involved in CL and CP. Therefore, grouping of data of the three types of clefts in studies on the etiology should be avoided.

Reproductive senescence in free-ranging North American elk Cervus elaphus Cervidae

Mammalia ◽  
2019 ◽  
Vol 83 (6) ◽  
pp. 593-600 ◽  
Author(s):  
Louis C. Bender ◽  
Jessica R. Piasecke
Keyword(s):  
Age Structure ◽  
Cervus Elaphus ◽  
North American ◽  
Reproductive Senescence ◽  
Female Age ◽  
North American Elk ◽  
Age Related ◽  
Consistent Manner ◽  
Multiple Species ◽  
Free Ranging

Abstract Successful production of calves is necessary for growth of North American elk (Cervus elaphus Linnaeus 1758) populations, but few studies have evaluated age-related effects on both the conception and survival of a calf to weaning in multiple free-ranging populations. Conception and survival of calves to weaning were both affected by maternal age, with old (age 9 and older) females showing reproductive senescence as compared to prime-aged (ages 2–8) females despite achieving similar or greater size and condition. Reproductive senescence in our free-ranging populations ultimately resulted in old females weaning fewer calves (0.42 calves/female) than did prime-aged females (0.64 calves/female). Other factors, especially maternal size, also influenced conception and survival to weaning, and these interacted with age in a consistent manner, i.e. larger females or females in better condition were more likely to conceive and successfully wean calves within each age class. Female age structure receives less consideration in ungulate management than does male age structure, despite demonstrated impacts on population productivity of multiple species because of reproductive senescence. Because of the large proportion of individuals in senesced age classes in elk populations, low productivity in populations may simply reflect female age structure, rather than other frequently hypothesized factors.

scholarly journals Catatropis pakistanensis n. sp. (Trematoda: Notocotylidae) from Northern shovelers, Anas clypeata (Anatidae: Aves) from Pakistan with some remarks on the history of Catatropis species

2012 ◽  
Vol 49 (1) ◽  
pp. 43-48 ◽  
Author(s):  
R. Schuster ◽  
G. Wibbelt
Keyword(s):  
Electron Microscopy ◽  
Histological Evaluation ◽  
Thin Sections ◽  
Genital Opening ◽  
Morphological Studies ◽  
Anas Clypeata ◽  
History Of ◽  
Free Ranging ◽  
A New Species ◽  
Scanning Electron

AbstractFive out of 15 free-ranging Northern shovelers (Anas clypeata Linneus) caught in Pakistan were infected with notocotylid trematodes. Out of the 31 flukes, 10 specimens were used morphological studies, 4 others were also examined by scanning electron microscopy and one remaining trematode was cut in serial semi-thin sections for histological evaluation in order to describe a new species. Like all species of this genus, Catatropis pakistanensis n. sp has a median ridge starting posterior to the basis of the cirrus sac and extends posterior to the ovary. Bilateral to this ridge there are two rows of 9–10 ventral papillae each. Metraterm and cirrus sac are equally in length. In contrast to most other Catatropis spp. the genital opening in C. pakistanensis is situated between the oral sucker and bifurcation of the caeca.

scholarly journals Excerpts on the History of Mother and Infant Protection in Moscow at the beginning of the 20th century

2018 ◽  
Vol 17 (4) ◽  
pp. 262-265
Author(s):  
Larisa E. Gorelova ◽  
Vera N. Shelkova
Keyword(s):  
Infant Mortality ◽  
20Th Century ◽  
Medicine Development ◽  
High Infant Mortality ◽  
History Of

The article is devoted to the important course of the medicine development at the beginning of the 20th century — mother and infant protection. The contribution of pediatricians and obstetricians to prevention of high infant mortality in Moscow is represented. The activities of G.N. Speransky and other doctors in public benevolent institutions are reported.

PUBLIC HEALTH, NURSING AND MEDICAL SOCIAL WORK

PEDIATRICS ◽  
1952 ◽  
Vol 9 (4) ◽  
pp. 515-516
Keyword(s):  
Public Health ◽  
Infant Mortality ◽  
Birth Rate ◽  
The United States ◽  
Vital Statistics ◽  
Infant Mortality Rate ◽  
National Office ◽  
History Of ◽  
Health Nursing ◽  
One Year

ON THE basis of provisional data it appears that infant mortality in the United States has continued to improve in 1951, despite the fact that the birth rate has gone up again. The National Office of Vital Statistics, Public Health Service, has published in the Monthly Vital Statistics Bulletin for February 1952 an analysis of the telegraphic reports received from the various states for the year 1951. While the data are subject to correction [See Figure 1. in Source PDF.] and final figures will almost surely result in slight revisions, previous experience indicates that the general trend is quite accurate. Figure 1 presents the month by month comparison, throughout the year, for birth rate, death rate, and infant mortality rate. Marriage license rate is shown through November 1951. It will be noted that in every month of the year the birth rate was higher than in the corresponding month of 1950. The annual rate was 24.5 per 1000 population, 4.3% higher than in 1950 but 5% lower than the peak birth rate reached in 1947. Taking into account an estimate for births which were not reported it is thought that 3,833,000 births took place in 1951. This is the greatest number of births in one year in the history of our country.

The Poster Children of Pakistan

2018 ◽  
Author(s):  
Jamal J. Elias
Keyword(s):  
South Asian ◽  
Visual Representation ◽  
Female Age ◽  
History Of Religion ◽  
Islamic Thought ◽  
History Of ◽  
Broad Framework ◽  
Asian Context ◽  
Age Category

This chapter focuses on the visual representation of children in the religious poster arts of Pakistan. As in the previous chapter, it locates the representation of childhood within the history of religion and education in the society. The chapter provides a brief history of poster arts in Pakistan, contextualizing the importance of chromolithography in a broader South Asian context. It continues the analysis of cuteness undertaken in the previous chapter, locating it within a broad framework of beauty, which it then demonstrates is related to virtue and goodness in Islamic thought. Focusing on the differences between the ways in which girls and boys are represented, the chapter argues for important differences in the way the gender of children is conceptualized in Islamic societies, introducing a category called girl-women as an indeterminate female age category that lies between the undisputed girlhood of the child and adult womanhood, which is actualized through marriage and motherhood.

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