Relationship between fetal weight and placenta

1927 ◽  
Vol 23 (2) ◽  
pp. 250-250
Keyword(s):  
Maternal Age ◽  
Full Term ◽  
Placental Weight ◽  
Fetal Weight ◽  
First Birth ◽  
Subsequent Birth ◽  
Mathematical Formulas

The relation of fetal and placental weight under different conditions was studied by Westermark on a material of 20,000 cases, using mathematical formulas, and he came to the following conclusions: fetal weight is less at first birth than at subsequent birth and is independent of the age of the mother; the placenta of full-term fetuses weighs on average 644.0 in boys and 657.0 in girls; the ratio of placental to fetal weight in boys is 1: 5.47, in girls 1:5.17; fetal weight arrives faster than placenta weight; the number determining the proportion between fetal weight and placenta weight increases with maternal age, but is independent of the number of former pregnancies; it is greater in twins.

scholarly journals Prevalence of Episiotomy and Perineal Lacerations in a University Teaching Hospital, North-Central Nigeria

2018 ◽  
Vol 1 (2) ◽  
pp. 142-147
Author(s):  
S K Hembah-Hilekaan ◽  
A O Ojabo ◽  
O Audu ◽  
P E Onche ◽  
M T Maanongun
Keyword(s):  
Risk Factors ◽  
Birth Weight ◽  
Teaching Hospital ◽  
Maternal Age ◽  
Fetal Weight ◽  
University Teaching ◽  
Warning Sign ◽  
Perineal Laceration ◽  
Perineal Lacerations ◽  
Vaginal Deliveries

Episiotomy is an incision on the introitus and the perineum to increase pelvic outlet to facilitate childbirth and prevent trauma to fetal and maternal tissues. Episiotomy and perineal laceration may predispose the woman to short and long term complications. The objective of this study was to determine the prevalence of episiotomy and perineal lacerations and their associated risks factors at Benue State University Teaching Hospital, Makurdi, Nigeria. Retrospective data of all women who had spontaneous vagina delivery over a 3 year period with perineal laceration/episiotomy were reviewed. Data was obtained from the records and information on the socio-demographic variables, episiotomies, lacerations and the birth weight of infants. The associated risk factors were recorded using Statistical Package for Social Sciences version 22.Of the 636 vaginal deliveries, 85(13.4%) had lacerations with 65(10.2%) first degree, 19(3.0%) second degree and 1(0.2%) major laceration. Episiotomy rate was 132(20.8%). The mean parity and birth weight of infants were 2.62(SD= ± 1.83) and 3.1 kg (SD= ± 0.767) respectively. The highest number of perineal tears 69(10.8%) were in the lower age group (≤ 30 years). A similar observation was noted in respect of episiotomies which rate however decreased with parity. The relationship between maternal age, parity, booking status, fetal weight and the perineal status at delivery was statistically significant (P≤ 0.05). Episiotomy and perineal laceration rates in our institution were low. The major risk factors were low parity, young maternal age and increasing fetal weight at birth and their presence should be an early warning sign. We advise perineal support for all women during delivery.

scholarly journals Absolute Risks of Obstetric Outcomes Risks by Maternal Age at First Birth

Epidemiology ◽  
2018 ◽  
Vol 29 (3) ◽  
pp. 379-387 ◽  
Author(s):  
Laura Schummers ◽  
Jennifer A. Hutcheon ◽  
Michele R. Hacker ◽  
Tyler J. VanderWeele ◽  
Paige L. Williams ◽  
...  
Keyword(s):  
Maternal Age ◽  
Obstetric Outcomes ◽  
Age At First Birth ◽  
First Birth

Mean Placental Birth Weight Ratio at Term in Primigravidae

2021 ◽  
Vol 15 (11) ◽  
pp. 3496-3498
Author(s):  
Nazia Muneer ◽  
Shamaila Shamaun ◽  
Afshan Shahid ◽  
Riffat Jaleel ◽  
Mehreen Iqbal ◽  
...  
Keyword(s):  
Birth Weight ◽  
Maternal Age ◽  
Weight Ratio ◽  
Operational Definition ◽  
Cross Sectional Study ◽  
Placental Weight ◽  
Sectional Study ◽  
Inclusion Criteria ◽  
Cross Sectional ◽  
The Mean

Objective: To determine the mean placental birth weight ratio at term in primigravidae Study design: Cross-sectional study Place and Duration: Department of Obstetrics and Gynecology, Civil Hospital Karachi, duration was six months after the approval of synopsis from 1st January 2016 to 30th June 2016 Subjects and Methods: A total of pregnant women who fulfill the inclusion criteria were included in this study. After delivery, baby was weighed by using weight machine and weight of baby was also noted (as per operational definition). After expulsion of complete placenta, placental weight was measured by using weight machine. The placental-birth weight ratio (PBWR) were calculated as ratio of placental weight to neonatal weight multiplied by 100. Results: Mean ± SD of maternal age was 24.77±4.04 with C.I (24.11----25.42) years. Mean ± SD of placental weight was 505.84±99.97 with C.I (489.71----521.97) grams. Out of 150 neonatal babies 101 (67.3%) were male and 49 (32.7%) were female. Mean placental birth weight ratio was found to be 16.82±2.63 with C.I (16.39----17.24). Conclusion: It is to be concluded that placental weight increased according to the birth weight. The placental weight to birth weight ratio decreased slightly with advancing gestational age. Keywords: Placental weight, Birth weight ratio, Labour at term, Primigravidae

The partition of nutrients in ewes maintained in a moderate compared with a lean body condition in late pregnancy

1997 ◽  
Vol 48 (6) ◽  
pp. 743 ◽  
Author(s):  
D. M. McNeill ◽  
R. W. Kelly ◽  
I. H. Williams
Keyword(s):  
Body Weight ◽  
Body Fat ◽  
Body Condition ◽  
Feed Intake ◽  
Late Pregnancy ◽  
Placental Weight ◽  
Fetal Weight ◽  
Fetal Size ◽  
Per Se ◽  
Free Body

The effect of ewe fatness on fetal weight at term was tested without the confounding effects of placental weight and feed intake. We hypothesised that fetal weights should be similar in fat or lean ewes with placentas of a similar size, and tested the hypothesis by manipulating nutrition so that, at mating, Merino ewes carrying a single fetus were in a medium (score 2·9, liveweight 46·6 kg) or lean (score 2·0, liveweight 40·6 kg) condition. They were maintained at this fatness difference until slaughter at Day 146 of pregnancy when fetal, placental, and maternal tissues were weighed and analysed for composition. Subgroups (n = 8 per fatness group) slaughtered at Day 110, a stage when most placental hypertrophy is complete but the majority of fetal hypertrophy is yet to occur, confirmed that the treatments differed in ewe fatness (3·82 v. 9·19 kg empty-body fat, s.e.m. = 0·960; P < 0·001) but not placental weight (487 v. 538 g, s.e.m. = 41·5, P > 0·05). By Day 146, fatness differences (4·77 v. 9·56 kg empty-body fat, s.e.m. = 0·960, P < 0·001) and placental similarities (434 v. 502 g, s.e.m. = 38·3, P > 0·05) were maintained, and both groups produced fetuses of similar size (4408 v. 4382 g, s.e.m. = 204·6, P > 0·05). However, the fetuses in the lean ewes had 20% less fat/kg fat-free body weight (24 v. 30 g/kg, s.e.m. = 1·3, P < 0·01). Fetal weight was correlated with placental weight (r = 0·70; P < 0·01) but not with ewe fatness. Fetal fatness, however, was correlated with ewe fatness (r = 0·69; P < 0·01). Ewe fatness per se did not influence fetal size but did influence the deposition of fat in the fetus, possibly via a greater ability of fatter ewes to partition more glucose toward their fetus.

Young maternal age at first birth and mental health later in life: Does the association vary by birth cohort?

2016 ◽  
Vol 157 ◽  
pp. 9-17 ◽  
Author(s):  
Zoe Aitken ◽  
Belinda Hewitt ◽  
Louise Keogh ◽  
Anthony D. LaMontagne ◽  
Rebecca Bentley ◽  
...  
Keyword(s):  
Mental Health ◽  
Birth Cohort ◽  
Maternal Age ◽  
Age At First Birth ◽  
First Birth ◽  
Young Maternal Age

Cancer risk associated with early and late maternal age at first birth

2005 ◽  
Vol 96 (3) ◽  
pp. 583-593 ◽  
Author(s):  
Ray M. Merrill ◽  
Stephanie Fugal ◽  
Lelinneth B. Novilla ◽  
Matthew C. Raphael
Keyword(s):  
Cancer Risk ◽  
Maternal Age ◽  
Age At First Birth ◽  
First Birth
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