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Pregnancy Timeline by SemestersDevelopmental TimelineFertilizationFirst TrimesterSecond TrimesterThird TrimesterFirst Thin Layer of Skin AppearsEnd of Embryonic PeriodEnd of Embryonic PeriodFemale Reproductive SystemBeginning Cerebral HemispheresA Four Chambered HeartFirst Detectable Brain WavesThe Appearance of SomitesBasic Brain Structure in PlaceHeartbeat can be detectedHeartbeat can be detectedFinger and toe prints appearFinger and toe prints appearFetal sexual organs visibleBrown fat surrounds lymphatic systemBone marrow starts making blood cellsBone marrow starts making blood cellsInner Ear Bones HardenSensory brain waves begin to activateSensory brain waves begin to activateLungs begin to produce surfactantBrain convolutions beginPeriod of rapid brain growthImmune system beginningImmune system beginningWhite fat begins to be madeWhite fat begins to be madeFull TermBrain convolutions beginHead may position into pelvisFetal liver is producing blood cells
Roll over chart for details of fetal developmental progress

News Alerts July 2016  Birth Spiral  Makeup therapy in a down economy Birth Spiral Cinnamon may be a fragrant medicine for the brain Birth Spiral A molecule for making friends  Pyramid cells cluster, vibrate and signal our brain  How environmental stresses cause birth defects  Virus found in women with unexplained infertility Pregnant nicotine exposure higher than reported Cells send out stop/go signals to extend nerves Anatomy of a decision Sound waves to separate twin placentas?  Selfish mitochondria implicated in diseases  Powering up: growing neurons make an energy jump  Virus in pregnancy linked to austim disorders Bipolar disorder link to striatum brain region Epigenetics could explain puzzle of diabetes inheritance   Many common chemicals endanger brain development   Children's immune cells may explain all their illnesses "Feeling good" stimulates immune system How the Pentagone protein controls development   Why does mitochondria DNA only come from mom?  Finding human development's first gear   Study shows Zika infection longer in pregnancy  Daughters of obese mouse dads risk breast cancer CDC clinical trial for experimental Zika vaccine Saint Louis University to launch Zika vaccine trial  Loss of essential protein linked to hydrocephalus Low thyroid in pregnancy risks schizophrenia in baby Teen poor attention control risk for anxiety disorders Pregnant diet can affect multiple generations New insights uncovered in Prader-Willi syndrome Breastmilk best for premature baby's heart Gene mutation found explaining multiple sclerosis Individuals respond differently to Zika?  Moving can be hazardous to your child's health How melanin gives color to skin, hair and eyes Babies really are cute! Your biological clock has a time stamp   Maternal effects of smoking continue long after birth  A brain clock keeps our memories ticking  Gene sequencing diagnoses rare newborn diseases The developmental origins of culture How the brain makes — and breaks — a habit Jun 2016 Money really does matter in relationships   Executive power — developes from the nursery  Can lifespan be extended by point of view?  Mitochondrial DNA therapy still imperfect  Eating fruit prenatally boosts babies' cognition  BPA in pregnancy can put baby on course to obesity  Genes for nose shape identified  Neurons must wriggle to reach their final destination  Atlas of Human Malformation Syndromes being created  Fathers' age and lifestyle linked to birth defects A safe way to deliver drugs to the placenta  Zika causes neural stem cells to self-destruct  Scientists map brain to decode inner thoughts  You are what you eat!  Twin study finds gut microbiomes run in families  Another reason to breastfeed Breast milk fed preemies show larger brain growth An aggregate of protein in nerve cells can cause ALS  How did human limbs evolve?  Asynchronous waves key to embryo development  A cell's 'fuel gauge' promotes healthy development  Safe, inexpensive chemical reverses progeria  Confused cell signals lead to genetic disorders May 2016| Experimental drug cancels affect of Fragile X gene  Preschool nurturing boosts child's brain growth  Too much 'noise' can affect brain development  Human patterns follow the same cues as bacteria  The unique biology of human breast milk  Clues to how cells repair broken DNA First protein crystal structure corrects wrong theory  Deletions on chromosome 22, one cause of autism? Microvesicles for brain radiation recovery?  New type of cell death may help neurons regenerate  Single-cell embryos can be chimeras  Trophoblast cells unlikely entry point for Zika  Gene found for cleft palate  An overfed fetus can become an overweight teen  Three generations affected by one DDT exposure  How early female human embryos control X  Abnormalities in early embryos may self correct  How to prevent asthma in your newborn?    Protein on neural stem cell is hijacked by Zika virus  Fragile X in mice responds to experimental drug  Born to run? Apr 2016|   Unraveling stem cells  Rewrite the text books! Fetal or placental cells? Precision medicine targets Lupus Cell 'rejuvenation' relies on telomeres PKU effect on brain more extensive than thought  A possible treatment for autism-like symptoms Complex learning dismantles barriers in the brain Can we turn off Alzheimer's disease?  A new kind of stem cell? Genes can cause neurological diseases  Brown fat in adults follows circadian rhythm  Mom's bacterial infection can change fetal brain  Zika virus breakthrough  Lack of stem cells causes recurring miscarriages  A first: earliest stages of human stem cell lines  One microRNA may affect many neuro disorders  Common gene links obesity to diabetes Perception of constant stress is passed on...   Snail shells help solve origins of body symmetry  Trimmer snips jumping genes  Mom's high alcohol level disrupts neonatal brain  Amino acids help kids overcome fetal malnutrition  Mar 2016   Zika virus linked to stillbirth, loss of brain tissue  How to regenerate peripheral nerves  How the nervous system trims its branches   Teaching stem cells to build muscle  'Pump' mechanism splits DNA for copying by RNA Stressed dads give offspring high blood sugar Cell division errors: infertility, disorders and cancers Copper key to brain cell development Bioelectric signals influence facial symmetry   Potential to treat hypertrophic cardiomyopathy   Fluorescent proteins light up living cells Tuning the volume on gene expression  Linking fetal to adult brain disorders  A quick, simple way to generate neural crest cells  New drug target for Rett syndrome  RNA quick — Protein slow   Mitochondria trigger cell aging  How to precisely regulate RNA polymerase? New app helps doctors predict preterm birth   Found - protein that turns off biological clock   Virus in pregnancy causes autism-like behavior Feb 2016|    A gene that allows for a new species?  3 Autism-linked molecules wire up neurons   Donor's genome impacts iPS cell outcomes  What you eat can influence how you sleep  Brain receptor regulates fat burning in cells Diverse gut microbes increase infection resistance  Zika virus, linked to birth defects, is spreading   Eat fish in pregnancy to improve baby's brain   Turning epigenetic marks OFF!  Cell signal strength turns on early stem cells   Slow stem cell division causes small brain?   Healing muscular dystrophy with CRISPR   Of protein kinases, embryos and cancer  Can having more children slow down aging? Uterine microorganisms may set stage for disease   A mathematical model for animal stripes   Physics attempts to explain why stem cells move  Epigenetic change leads to cerebellum circuitry   Id tags define developing neural circuits   Mechanism for how organs branch found   How to multiply teeth!   Jan 2016