Caesarean deliveries, subsequent reproductive behaviour and children ever born in India

Against the backdrop of the alarming rise in Caesarean section (C-section) births in India, this study aimed to examine the association between C-section births, fertility decline and female sterilization in the country. A cross-sectional design was used to investigate the association between C-section delivery and subsequent reproductive behaviour in women in India. Data were from the National Family Health Survey (NFHS-4). The study sample comprised 255,726 currently married women in the age group of 15–49 years. The results showed a strong positive relationship between C-section births and female sterilization. The predicted probabilities (PP) from the multivariate regression model indicated a higher chance of female sterilization in women with C-section births (PP = 0.39, p<0.01) compared with those with non-C-section births (PP = 0.20, p<0.01). Both state-level correlation plots and Poisson regression estimates showed a strong negative relationship between C-section births and mean children ever born (CEB). Based on the results, it may be concluded that the use of C-sections and sterilization were strongly correlated in India at the time of the NFHS-4, thus together contributing to fertility decline. A strong negative association was found between the occurrence of C-sections and CEB. The increased and undesired use of C-section births and consequent female sterilization is a regressive socio-demographic process that often violates women’s rights. Fertility decline should happen through informed choice of family planning and must protect the reproductive rights of women.

Breeding and reproductive behaviour of the neo-tropical opossum, Didelphis marsupialis insularis, Allen 1902 under captive conditions

Developing a captive breeding system for the widely hunted Caribbean species of opossum Didelphis marsupialis insularis can greatly aide in the management and conservation of this species in the neo-tropics. Although this species possesses ideal traits for captive breeding in this region (tolerance to high heat and humidity, high reproductive rate, and resistance to disease), challenges due to its aggressive behaviour and limited information on its breeding behaviour have prevented a system from being developed for this species. The present study describes a breeding system, and the reproductive behaviour of this species under captive conditions. Six (1 male; 5 females) adult opossums were maintained and managed for breeding over a ten (10) month period. Pouch litter sizes averaged 5±2.5 with a range of 2 to 8. Gestation length was found to be 13.25±0.96 days and 4 litters (n=23) were successfully weaned at 11-13 weeks. It was found that the male D. m. insularis exhibits behaviours of interest that can serve as indicators for receptivity of the female, and overall, that this species can be successfully reared and bred under captive conditions in the neo-tropics.

Mating behaviour of the lizard Ameiva ameiva in Brazil

The courtship and copulation behaviours of the lizard Ameiva ameiva is described from field observations made at various locations in Brazil. In males, the main behaviours observed during one observation of courtship were head bobbing, circling and walking over the females, rubbing his body against the female, mounting, and dismounting. Females generally remain passive throughout courtship. The reproductive behaviour of A. ameiva resembles that of other teiids, however males exhibit some behavioural peculiarities, such as circling the female to restrict her movements, no cloacal rubbing against the ground, and no biting during copulation.

Pregnancy, childbirth and health of female labour migrants from Central Asia in Russia

The research note contains an analysis of data on health, pregnancy, and childbirth experience among female labour migrants arriving in Russia from Central Asia. Empirically, the study bases on the data of three surveys conducted in 2015, 2017, and 2020. In total, the surveys contain information on 2,028 migrants from Tajikistan, Kyrgyzstan, and Uzbekistan living in Russia. The analysis proves that with gradual feminization of labour migration from Central Asia, pregnancy and childbirth in a significant part of labour migrants take place in risky living conditions; the existing system of maternal health protection for migrants in Russia needs modernization. Compared to earlier studies on this topic, the survey data showed a higher proportion of female migrants who had got pregnant and gave birth in Russia along with a lower proportion of migrants who terminated pregnancy. These differences may indicate a change in the reproductive behaviour of women who come to work in Russia from the countries of Central Asia. The presented note shows the need for in-depth studies of the reproductive behaviour of labour migrants in Russia, as well as the development of national migration statistics, which should become gender sensitive.

Sociocultural determinants of reproductive behaviour of ethnic groups

The article is devoted to consideration of sociocultural determinants of reproductive behavior of ethnic groups. Sociocultural determinants are those conditions (circumstances) that affect the nature of reproductive behavior of ethnic groups. These include social, economic and worldview factors. Depending on how the culture of ethnic community changes, the content of these factors changes. The gender and regional dimension is important in this case.

Maternal responses to pup calls in a high-cost lactation species

Bonding between mothers and their young is fundamental to mammalian reproductive behaviour and individual fitness. In social systems where the risk of confusing filial and non-filial offspring is high, mothers should demonstrate early, strong and consistent responses to their kin throughout the period of offspring dependence, irrespective of maternal traits. We tested this hypothesis through playback experiments in the northern elephant seal Mirounga angustirostris , a phocid species that breeds in high-density colonies. We found that mothers recognized their offspring throughout lactation and as early as 1–2 days after parturition. Measures of experience (age) and temperament (aggressivity) did not predict their response strength to filial playback treatments, nor did pup age or sex. Some mothers showed great consistency in behavioural responses throughout the lactation period, while others were less predictable. The strength of a female's response did not influence her pup's weaning weight; however, more consistent females weaned pups of higher mass. This is a rare demonstration of individual recognition among phocid mothers and their offspring, and suggests that consistency in maternal responsiveness may be an important social factor influencing the pup's growth and survival.

Post-Migration Fertility in Southern Europe: Romanian and Moroccan women in Italy and Spain

This paper seeks to analyse migrant women’s reproductive behaviour in two countries with the lowest fertility rates, namely, Italy and Spain. We assess differences in migrant fertility patterns according to country of origin by comparing the post-migration motherhood of Moroccan and Romanian women. We have used data from the “2007 National Immigrant Survey” (INE) and the ”2011-2012 Survey on Social Integration and Condition among Foreign Citizens” (ISTAT) to adopt an event-history approach to the factors that affect the birth of the first child after migration. Specifically, we focus on marital status upon arrival and on the number of previous children, controlling in turn for the women’s socioeconomic circumstances. The results show, firstly, that Moroccan women have a higher fertility rate than Romanians in both countries. Secondly, the risk of the first birth shortly after migration is higher among childless and married women, and this probability remain high even for women from Morocco with children. Thirdly a cross-country comparison reveals that the results related to childbearing patterns are similar.

Studies on Reproductive Development and Breeding Habit of the Commercially Important Bamboo Bambusa tulda Roxb

Compared to other grasses, flowering in bamboo is quite divergent, yet complex with respect to time to flower, number of individual culms in a population that have been induced at a time (sporadic vs. gregarious), nature of monocarpy, morphology of inflorescences (solitary spikelet vs. pseudospikelet), biology of pollen and nature of genetic compatibility. Wide diversity exists even across species and genotypes. However, due to the rarity of flowering and inaccessibility, few studies have been done to systematically analyse diverse aspects of the reproductive behaviour of bamboo. In this study, four recurrently occurring, sporadic flowering populations of Bambusa tulda have been closely observed over the last seven years. Detailed inflorescence and floral morphology and development of reproductive organs have been studied. Pollen viability was assessed by staining and in vitro germination. Self and cross pollination experiments were performed in a plantation site to assess the genetic nature of pollen-pistil interaction. The study identifies interesting reproductive features, that are not common in other grasses. A few important observations include the early appearance of a solitary spikelet vs. late appearance of a pseudospikelet in the flowering cycle, low rate of pollen germination, protandry, self-incompatibility and higher rate of seed setting by the pseudospikelet as compared to the solitary spikelet. The findings will not only be useful to understand the reproductive behaviour of this non-woody timber plant, but will also be useful for forest management and sustainable use of bamboo bioresources.

Understanding the Role of Semiochemicals on the Reproductive Behaviour of Cheetahs (Acinonyx jubatus)—A Review

The cheetah species (Acinonyx jubatus) is currently listed as vulnerable according to the International Union for Conservation of Nature (IUCN). Captive breeding has long since been used as a method of conservation of the species, with the aim to produce a healthy, strong population of cheetahs with an increased genetic variety when compared to their wild counterparts. This would then increase the likelihood of survivability once released into protected areas. Unfortunately, breeding females have been reported to be difficult due to the age of these animals. Older females are less fertile, have more difficult parturition, and are susceptible to asymmetric reproductive aging whereas younger females tend to show a significantly lower frequency of mating behaviour than that of older females, which negatively affects breeding introductions, and therefore mating. Nonetheless, the experience from breeding methods used in some breeding centres in South Africa and the Netherlands, which also rely on the role that semiochemicals play in breeding, proves that cheetahs can be bred successfully in captivity. This review aims to give the reader an in-depth overview of cheetahs’ reproductive physiology and behaviour, focusing on the role that pheromones play in this species. Furthermore, it aims to provide new insight into the use of semiochemicals to improve conservation strategies through captive breeding.

Characteristics of the reproductive behaviour of the population in Iran and Russia during the Pandemic period COVID-19

Introduction. The urgent issue of the challenges of the COVID-19 pandemic, which negatively affected the demographic development of the world’s countries, is the search for new effective mechanisms for the development of demographic potential, which is not possible without appropriate justification monitoring data. The aim of the study is to analyze trends in demographic processes and assess the reproductive behavior of the population of Russia and Iran, as well as develop recommendations in the field of monitoring demographic processes, taking into account the need to study their changes as a result of the spread of COVID-19, which seems significant for determining effective directions and measures of demographic policy in terms of increasing the birth rate in Russia and Iran in the post-pandemic period. Materials and methods. The article is based on the data of the official national statistics of the countries (the Federal State Statistics Service of the Russian Federation and the Statistical Center of the Islamic Republic of Iran), the international database of the UN Population Division, and sociological information. The general research period is determined by the boundaries from 2000 to 2019. To assess the determination of reproductive behaviour in Russia and Iran, general statistical methods of data analysis were used (for example, indicators of structure, dynamics, implementation of the plan), unique methods of demographic statistics (construction of age and sex pyramids of the population, total fertility rate, and others), methods of sociological research (results are presented as All-Russian sociological research “Demographic well-being of Russians”, conducted with the participation of the authors in 2019-2020 on the territory of 10 constituent entities of Russia). Results. An assessment of fertility trends in Russia and Iran is given, general and specific traits of the character and mechanisms of reproductive behaviour are identified. The substantiation of the improvement of directions and measures of demographic policy is given, taking into account the assessment of its effectiveness. In Russia, it was aimed at increasing the birth rate. In Iran, on the contrary, at decreasing it. In both countries, the policy was very effective - in Russia in 2007-2016. the birth rate for second and subsequent births increased significantly in Iran in the late 1980s-1990s. The decline in fertility was one of the largest in the world. If in Iran the birth rate is now close to the level of simple reproduction of the population (in 2017, the total fertility rate was 2.12), then in Russia, especially after the decline since 2017. In this case, it is far from this level. Conclusion. The article substantiates the need to improve scientific monitoring of the demographic consequences of the COVID-19 pandemic.