Fetal Development - Science topic

I'm trying to develop a paper concerning the use of ART in HIV positive and negative pregnant women and how that has effected fetal development.

What are the main differences between chronic hypertension and gestational hypertension in fetal growth? Do these babies grow differently?

Hello fellow nerds,

A food for thought question that I would love others opinion on.

At what stage of fetal development, is the fetal cell count equal to half the cell count of a newborn.

This question stemmed from a thought experiment: if we were only looking at cell count when is fetal development halfway.

Assume GA 38.6

Is 8th week the earliest week where we can determine the fetal sex ?

Unbooked primigravida diagnosed with diabetes mellitus of 3 years duration and defaulted on taking her medication, presented with IUGR, was delivered of female infant of 1.7 kg at term. The mother has no renal pathology and the baby has no congenital anomaly.

A very broad statement deliberately structured as an "open probe" to survey think on the subject on the way to a detailed analysis. Does the fetus "think", sense, learn, dream, develop complex behaviours through learning. How would one measure such function in utero? Go for it!!

Hello, all.

I am planning to make a survey concerning toxoplasmosis and its influence on human society. To perform the survey I also need data about the first birth age of women (usual time for toxoplasma test) in different countries, since Toxoplasma prevalence grow with age. However I could not find such data about Iran. Even Google, UN and CIA together cannot shed light on this problem. Perhaps, I've missed something. Can anybody tell me, where I can find these data?

Thank you in advance,

Misha

I study amino acid transport through (and synthesis by) placenta in different species.

I found the data about paired dam-fetus serum (plasma) content of AA in horse, sheep, pig etc but not in cow. The only paper dates from 1979 (DEMIGNÉ et al.)

Does anyone have any suggestion regarding a recent study of dam-fetus serum (plasma) concentrations of AA in cows?

Thank you.

In medical imaging we are using ultrasound for detecting abnormalities in unborn babies. Can we do same by USCT?

I'm trying to find information on how to compare developmental stages between mice and humans. There are nice overviews on comparing mouse embryological stages to human gestational weeks (eg carnegie stages).

What I miss and can't seem to find anywhere, is a comparison between mouse postnatal and human gestational weeks. Does anyone have any info on this? Thank you.

I am wondering what specific hormones the fetus may use to signal its condition/needs to the mother and alter her biology to meet these needs. 

I was wondering if anyone knew of a situation where a mother became infected with rabies, when pregnant with a viable fetus. If the fetus could be delivered prematurely, would it also have the disease? What sort of impact would that have/ did that have on the child's neurological development? Does anyone have any recommended reading on this subject?

Hello: Can anyone pls help me to identify an available data set on prostate cancer and birth characteristics (gestational age, birth weight, birth length, time to puberty etc)? 

It is already know variations in the circle of willis are associated with intracranial aneurysm formation due to change in the hemodynamic flow. I would like to know what is the likelihood of a patients with UIA, to rupture if he has a variation in the circle of willis, whats is the risk of this aneurysm get rupture. 

Breast milk has a clear effect on the development of bones and muscles of the newborn.

but are there any clear data showing if due to breastfeeding bones develop first? or muscles develop first? (Or aster than one another) ? Or Together (at the same rate)

I wish to determine the main sub-events on a traces. However, They are usually overlapped and some simple method like finding local maximum is easily defaulted by a small noise added on a main pulse. I think maybe I should get the envelop first and then find the main sub-events orderly. Do you have better idea about how to do it automatically and efficiently?

i just want to ask the action of body immune system against the embryo before and after placenta formation.

can anyone give me examples of its toxicity and can it be rank from its severity?

All of we know that brest feeding have a great role on neonatal health but my concern is now a days we can see mothers are using formula milk and their babies are also fine. Then is it the time to re think.

-  Is early appearance of alpha waves have any significance in infants maturity?

early pregnancy diagnosis in goats

What is the current progress in science and philosophy regarding definitions of a human being at fetus stage and relation to consciousness? 

DW MRI better to differentiate fibroids from adenomyosis on way of restricted water in adenomyosis than fibroids 

Microcephaly is a rare side effect in these cases. I need to know exactly how rare.

In South Asian countries, it is a common trend that after childbirth, women press the forehead and also backside of the skull to give it specific shape. Do it has any effect on the brain function/number of neurons?

The context is, Gene-Nutrient interactions in fetal development and onset of chronic diseases

I’m making research about the possibility of fetus hearing perception (in terms of Hz).

We know that the future baby has a important preference to the mother’s voice. This voice arrive to the fetus by the spinal column and the sound is very high in tone.

Due to the fact that high tones are stimulating for human metabolism, fetus hears ultrasound and, from the other side, people older than 30-40 years are not yet able to hear more than 15-17 KHz, the question is:

Is it possible that the fetus has a specific Hz range hearing, able to listen to very high frequency like ultrasound and this capacity slowly disappears in perinatal life?

I’d like to listen to your opinion, that I consider very important for me.

Has anyone any experience of this or seen articles relating to it?

How reliable is visual determination of the Signal intensity of fetal lung in diagnosing hypoplastic changes?

Can quantitative (ROI) measurements of fetal lung signal intensity and ratios with other fetal structures (amniotic fluid, muscles)  help in assessment of fetal lung maturity??

uterine or umbilical artery Doppler

 what is better for manegment off unruptured ectopic pregnancy ? salpigiotomy or salpingiostomy ? 

#gynecology > obstetris > ectopic pregnany 

What signals or mediators might be involved ?

Alpha - fetoprotein is an alpha-globulin produced by embryonic hepatocytes and present in normal fetus and new born during the first days of life. But, in serum, high level is encountered in children with various neoplasia including emryonic carcinoma, vitelline tumor, teratoma and 2/3 of malignant epithelial hepatic neoplasia.

Would it be too early in terms of developmental stage?

 In which histological stage of placentation, the placenta start to work physiological as a well-developed type. Please if you have information on experimental animals such as rat, hamsters or mice please added. during implantation, the embryo nourished through diffusion. during that time the other site of placentation building up the placentation cone. At which histological stage this placentation cone start to make nourishment from maternal through fetal passing though the fetal-maternal barrier. which materials can pass through. I meant only fluids or  cells, viruses, parasites can pass through or it depends on biology of pathogen.

It is interesting to know, the authors well know about of the biology of the human fetus? Physiology of human pregnancy is that between the fetus and the mother's body, there is a organ that up to 24 perform of the function of the endocrine system of the fetus, that is the placenta. This is the first thing. Secondly to maintain a normal pregnancy need huge concentration of estrogen and progesterone, but androgens are not, the content of which is negligible (if at all they circulate in the blood of the fetus) during pregnancy. That is why the male fetus in contrast to in the female fetuses for at least of the period of fetal development and several years after spermatogenesis is not occurs, as it requires at least a minimum amount of androgens. That's why when any threats abortion obstetricians artificially increases the concentration of estrogens and progestins in pregnant women to prevent miscarriage. Third, start the production of hormones in fetus begins only at 20-24 weeks of development, after maturation of the pituitary gland, which is coincident with the first of brain potentials. And at the end, placenta - a powerful factor in hormone metabolism and almost all steroids and androgens generally transformed by aromatase necessary to maintain pregnancy in estrogens. Therefore, the big question is level of which hormones increases by congenital adrenal hyperplasia of fetus? What kind of estrogen-androgen balance is all about? But hypotheses is the hypotheses, whatever it was.

I want to know that how CSF, White matter, grey matter, skull , skull - fetal brain boundary and CSF-fetal brain boundary are looking in fetal brain MRI.

Maternal nutrition affects fetal development, and one important dietary determinant of fetal growth may be TFAs. TFAs may block the placental transfer of omega-3 fatty acids to the fetus or disrupt their metabolism. The purpose of this analysis was to examine the association between TFA consumption during pregnancy and fetal growth among

infants born at term in a Spanish population.

It has been postulated and shown in some studies that fetal noise exposure and that of the expectant mother may cause fetal hearing loss and secondary effects. I am looking for current research in this area.

What is the incidence of missed abortion and positive consinguanity?

Do not reply with any comments on adult murine morphology. So, I have H&E cuts of P1(day one after birth) lungs. However, although I did not collect any LIVER tissue, I have what looks like cuts of mature lung tissue alongside some "liver looking" tissues. This has been seen in 4 separate samples from 4 mice. Anyone have experience with Day1 lung tissue and potentially heterogeneous structures? I know what alveolar sacs look like and the samples contain those structures, similar to adult lungs, however, it looks like they contain sections of preemie collapsed or undeveloped dense tissue. Anyone have experience on this?

In animal models (ovine) FGR leads to fetal decreased insulin levels. In human infants we sometimes observe severe hypoglycaemia associated with high insulin levels in these infants from quite early on.

Do we know what the cord insulin levels are in a suitably characterised group of human infants? I can only find a few studies with either extreme babies or very small numbers or older stuff with mixed or poorly defined aetiology/pathology.