Clinical trials of device-based therapies are difficult due to ethical issues surrounding device implantation, problems with blinding, potential carryover effects that may occur in crossover designs if substrate modification occurs, and subject heterogeneity.
Your doctor should also examine the possibilities of blocked fallopian tubes, sperm-related problems, uterine or egg implantation problems, and age-related decline in egg quality.
Is termination of pregnancy associated with a higher risk of placental implantation or retention problems (ie, placenta praevia, placental abruption and retained placenta) in a subsequent pregnancy?
Placental implantation and retention problems are known to occur more often after uterine trauma such as previous caesarean delivery or uterine surgery.
In this large nationwide cohort study, we found a positive association between surgical termination of pregnancy and subsequent preterm delivery, cervical incompetence treated by cerclage, placental implantation or retention problems and postpartum haemorrhage in a subsequent pregnancy.
To compare the incidences of preterm delivery, cervical incompetence treated by cerclage, placental implantation or retention problems (ie, placenta praevia, placental abruption and retained placenta) and postpartum haemorrhage between women with and without a history of pregnancy termination.
Adjusted ORs (95% CI) for cervical incompetence treated by cerclage, preterm delivery, placental implantation or retention problems and postpartum haemorrhage were 4.6 (2.9 to 7.2), 1.11 (1.02 to 1.20), 1.42 (1.29 to 1.55) and 1.16 (1.08 to 1.25), respectively.
We therefore set out to compare the incidences of (1) preterm delivery, (2) cervical incompetence treated by cerclage, (3) placental implantation or retention problems (PIRP) which include placenta praevia, placental abruption and retained placenta and (4) postpartum haemorrhage (PPH) in pregnancies of women with and without a history of pregnancy termination.
Methods are suggested for manufacturing vascularized organs to avoid rejection problems on implantation.
This study demonstrates that the IBS scaffold with novel design has significantly shortened corrosion period and less amount of corrosion products without causing any biological problems after implantation up to 13 months, therefore is promising for coronary application.
Although sample charging problems prevented implantation at significant depths, an ion mixing layer was formed, as shown by X-ray Photoelectron Spectroscopy (XPS) depth profile analysis, giving superior adhesion of the aluminum film to the substrate.
